-
Notifications
You must be signed in to change notification settings - Fork 0
/
OPC DA Auto 2.02 Source Code.htm
1174 lines (1174 loc) · 53.3 KB
/
OPC DA Auto 2.02 Source Code.htm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<html>
<head>
<title>OPC Data Access 3.00 Samples Readme</title>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 6.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
</head>
<body>
<table cellSpacing="4" cellPadding="4" width="100%" border="0">
<tbody>
<tr>
<td>
<p class="head1" align="center"><font color="#990000" size="4" face="Arial"><b>OPC
DA Auto Wrapper Source Code</b></font></p>
<p class="head1" align="center">
<font face="Arial" color="#800000" size="3"><b>November 25, 2005</b></font></p>
<p><font face="Verdana" size="2"><a name="Overview"></a></font><b><font size="3" face="Arial">Overview</font></b></p>
<p><font face="Verdana" size="2">The latest version of this document always on the
OPC foundation <a href="http://www.opcfoundation.org/Downloads/Data%20Access/OPC%20DA%20Auto%202.02%20Source%20Code.htm">
website</a>.</font></p>
<p><font face="Verdana" size="2">Any use of the <i>OPC DA Auto Wrapper Source Code</i>
is
subject to the terms the <a href="http://opcfoundation.org/Downloads/LicenseAgreement.asp">
OPC Foundation License Agreement</a>.</font></p>
<p><font face="Verdana" size="2">The <i>OPC DA Auto Wrapper Source Code</i>
consists of a ATL COM server that implements the Data Access
Automation Interface 2.02 and two test client applications: one written
with Visual Basic 6.0, the other written with Visual Basic .NET.</font></p>
<p><font face="Verdana" size="2">This code base was derived from the
original automation wrapper code, however, it incorporates numerous
bug fixes and design changes provided by various OPC Foundation
members.</font></p>
<p><font face="Verdana" size="2"><o:p></o:p><a name="SystemRequirements"></a></font><b><font size="3" face="Arial">
The DA Auto Wrapper and the <a href="http://www.opcfoundation.org/WebUI/DownloadFile.aspx/NET%20API/OPC%20.NET%20API%201.10%20Readme%201.01.htm?RI=137">.NET API</a></font></b></p>
<p class="MsoBodyText"><font face="Verdana" size="2">Both the DA
Automation Wrapper and the OPC .NET API allow .NET based OPC client
applications to communicate with existing COM based OPC servers.
Users should keep in mind that the DA Automation Wrapper is intended
to used only as a way to facilitate porting of existing VB 6.0
applications to VB .NET. The OPC Foundation recommends that any new
VB .NET client development use the .NET API for the following
reasons:</font></p>
<ul>
<li>
<p class="MsoBodyText"><font face="Verdana" size="2">it provides
almost all of the features of the DA automation wrapper;</font></li>
<li>
<p class="MsoBodyText"><font face="Verdana" size="2">it supports
Data Access 3.00 and XML Data Access 1.00 servers;</font></li>
<li>
<p class="MsoBodyText"><font face="Verdana" size="2">it takes
full advantage of new .NET features such as object serialization;</font></li>
<li>
<p class="MsoBodyText"><font face="Verdana" size="2">it requires
one less layer of code between the application and the server;</font></li>
<li>
<p class="MsoBodyText"><font face="Verdana" size="2">it provides a
common API framework for all specifications;</font></li>
<li>
<p class="MsoBodyText"><font face="Verdana" size="2">it will be
the starting point for the Unified Architecture (UA) .NET
API; </font></li>
</ul>
<p class="MsoBodyText"><font face="Verdana" size="2">This document
includes a detailed <a href="#NetApiMappings">mapping</a> of the
automation interface objects onto their equivalents in the .NET API.</font></p>
<p><font face="Verdana" size="2"><a name="Version"></a></font><b><font size="3" face="Arial">Terms
of Use</font></b></p>
<p><font face="Verdana" size="2">The following terms of use are in
addition to the standard <a href="http://opcfoundation.org/Downloads/LicenseAgreement.asp">
OPC Foundation License Agreement</a>.</font></p>
<p><font face="Verdana" size="2">The OPC Foundation does not
distribute the binary version of the Automation Wrapper directly to
end-users. It is up to OPC vendors to incorporate the binary into
the installation program for their products. Furthermore, OPC
vendors must be the first point of contact for any problems or
issues related to the wrapper raised by an end-user. End-users who
contact the OPC Foundation directly for support with the wrapper
will be directed back to the vendor that supplied the binary. </font></p>
<p><font face="Verdana" size="2">In addition, the OPC vendors that
choose to distribute the binary with their product must assume all
warrantee and liability obligations associated with the use of the
wrapper. In other words, the OPC Foundation maintains the source
code and does some testing to make sure it is functional , however,
any rigorous testing is the responsibility of OPC vendors who
distribute the wrapper.</font></p>
<p><font face="Verdana" size="2">That said, the OPC Foundation will endeavor
to release updated versions of the wrapper in a timely manner
whenever it receives a fix for the wrapper from an OPC vendor. </font></p>
<p><font face="Verdana" size="2"><a name="Version"></a></font><b><font size="3" face="Arial">Version
History</font></b></p>
<table border="1" width="100%" cellspacing="0" cellpadding="2" height="34">
<tr>
<td align="center" bgcolor="#000080" width="99" height="16">
<b><font color="#ffffff" face="Verdana" size="2">Date</font></b>
</td>
<td align="center" bgcolor="#000080" width="90" height="16"><b><font color="#ffffff" face="Verdana" size="2">Version</font></b></td>
<td align="center" bgcolor="#000080" height="16">
<p align="center"><b><font color="#ffffff" face="Verdana" size="2">Description</font></b></p>
</td>
</tr>
<tr>
<td align="center" width="99" height="7"><font face="Verdana" size="2">2003-11-24</font></td>
<td align="center" width="90" height="7"><font face="Verdana" size="2">2.02.4.00</font></td>
<td align="left" height="7"><font face="Verdana" size="2">Beta release to
the DA Automation working group. </font></td>
</tr>
<tr>
<td align="center" width="99" height="7"><font face="Verdana" size="2">2003-11-25</font></td>
<td align="center" width="90" height="7"><font face="Verdana" size="2">2.02.4.01</font></td>
<td align="left" height="7"><font face="Verdana" size="2">Removed
test code that forced wrapper to use DA 1.0 interfaces if
available.</font></td>
</tr>
<tr>
<td align="center" width="99" height="7" valign="top"><font face="Verdana" size="2">2003-12-17</font></td>
<td align="center" width="90" height="7" valign="top"><font face="Verdana" size="2">2.02.4.03</font></td>
<td align="left" height="7">
<p style="margin: 0"><font face="Verdana" size="2">Cleaned up
the trace mechanism (now will not create any files if tracing
is disabled).</font></p>
<p style="margin: 0"><font face="Verdana" size="2">Handles
VT_BYREF | VARIANT parameters passed by VB. </font></p>
</td>
</tr>
<tr>
<td align="center" width="99" height="7" valign="top"><font face="Verdana" size="2">2004-03-14</font></td>
<td align="center" width="90" height="7" valign="top"><font face="Verdana" size="2">2.02.4.04</font></td>
<td align="left" height="7">
<font face="Verdana" size="2">Fixed problems with beta release
reported by members.</font>
</td>
</tr>
<tr>
<td align="center" width="99" height="6" valign="top"><font face="Verdana" size="2">2004-04-29</font></td>
<td align="center" width="90" height="6" valign="top"><font face="Verdana" size="2">2.02.5.00</font></td>
<td align="left" height="6">
<p style="word-spacing: 0; margin-bottom: 0"><font face="Verdana" size="2">First
release to all members.<br>Now
deletes all registry keys used by trace on uninstall.<br>
Added mechanism to attach wrapper to an existing OPC server
instance.</font></p>
</td>
</tr>
<tr>
<td align="center" width="99" height="6" valign="top"><font face="Verdana" size="2">2004-09-28</font></td>
<td align="center" width="90" height="6" valign="top"><font face="Verdana" size="2">2.02.5.10</font></td>
<td align="left" height="6">
<p style="word-spacing: 0; margin-bottom: 0"><font face="Verdana" size="2">Fixed
bug in OPCBrowser.<font SIZE="2">ShowLeafs</font>.</font></p>
</td>
</tr>
<tr>
<td align="center" width="99" height="6" valign="top"><font face="Verdana" size="2">2004-11-07</font></td>
<td align="center" width="90" height="6" valign="top"><font face="Verdana" size="2">2.02.5.12</font></td>
<td align="left" height="6">
<p style="word-spacing: 0; margin-bottom: 0"><font face="Verdana" size="2">Fixed
problem in OPCItems.AddItems where errors code were not
checked propertly.<br>
Fixed trace problem when EXEs do not have version resource
blocks.</font></p>
</td>
</tr>
<tr>
<td align="center" width="99" height="6" valign="top"><font face="Verdana" size="2">2005-03-11</font></td>
<td align="center" width="90" height="6" valign="top"><font face="Verdana" size="2">2.02.5.20</font></td>
<td align="left" height="6">
<p style="word-spacing: 0; margin-bottom: 0"><font face="Verdana" size="2">Fixed
memory leak in OPCGroups::Remove.</font></p>
</td>
</tr>
<tr>
<td align="center" width="99" height="6" valign="top"><font face="Verdana" size="2">2005-11-25</font></td>
<td align="center" width="90" height="6" valign="top"><font face="Verdana" size="2">2.02.5.30</font></td>
<td align="left" height="6">
<p style="word-spacing: 0; margin-bottom: 0">
<font face="Verdana" size="2">Changed browsing feature to
use IOPCServerList2. This means that the wrapper now
enumerates DA 1.0a servers correctly. </font></p>
</td>
</tr>
</table>
<p><font face="Verdana" size="2"><a name="Distribution"></a></font><b><font face="Arial" size="3">Distribution</font></b></p>
<p><font face="Verdana" size="2">The source code is distributed in
this way:<o:p>
</font></p>
<table border="1" width="889" cellspacing="0" cellpadding="2">
<tr>
<td align="left" bgcolor="#000080" width="234">
<p align="center"><b><font color="#ffffff" face="Verdana" size="2">File</font></b></p>
</td>
<td align="left" bgcolor="#000080" width="641">
<p align="center"><b><font color="#ffffff" face="Verdana" size="2">Description</font></b></p>
</td>
</tr>
<tr>
<td width="234"><font face="Verdana" size="2">
<a href="http://www.opcfoundation.org/WebUI/Downloads.aspx?CM=1&SE1=Title&FV1=Custom&FT1=%Auto%&SE2=Version&FV2=Custom&FT2=2.02.5.30">OPC
DA Auto 2.02 Merge Module</a></font></td>
<td align="left" width="641"><font face="Verdana" size="2">Installs the
binaries and runtime configuration files.</font></td>
</tr>
<tr>
<td width="234"><font face="Verdana" size="2">
<a href="http://www.opcfoundation.org/WebUI/Downloads.aspx?CM=1&SE1=Title&FV1=Custom&FT1=%Auto%&SE2=Version&FV2=Custom&FT2=2.02.5.30">OPC
DA Auto 2.02 Source Code</a></font></td>
<td align="left" width="641"><font face="Verdana" size="2">Installs the binaries,
runtime configuration files and all source.</font></td>
</tr>
</table>
<p><font face="Verdana" size="2"><o:p></o:p><a name="SystemRequirements"></a></font><b><font size="3" face="Arial">System
Requirements</font></b></p>
<p class="MsoBodyText"><b><font face="Verdana" size="2"><a name="OperatingSystems"></a>Operating
Systems</font></b></p>
<p class="MsoBodyText"><font face="Verdana" size="2">The DA
Automation Wrapper is intended to run on all Windows systems that
support DCOM, however, the OPC Foundation only tests the wrapper on
Windows XP and Windows 2000. Vendors are asked to submit any fixes
required for other platforms.</font></p>
<p class="MsoBodyText"><font face="Verdana" size="2">All source code provided by
the OPC Foundation is only supported on Windows 2000 SP4 and Windows XP SP1.
That said; the source code has been designed to be portable to other operating
systems. For this reason vendors are encouraged to report fixes required to
port the samples to other operating systems so they can be incorporated into
the baseline and to improve the portability of future sample code.</font></p>
<p class="MsoBodyText"><font face="Verdana" size="2">All .NET components require
that the <a href="http://www.microsoft.com/downloads/details.aspx?FamilyId=262D25E3-F589-4842-8157-034D1E7CF3A3&displaylang=en">
.NET Framework Redistributable 1.1</a> or the <a href="http://www.microsoft.com/downloads/details.aspx?FamilyId=9B3A2CA6-3647-4070-9F41-A333C6B9181D&displaylang=en">
.NET Framework SDK Version 1.1</a> is present on the target system. The .NET
framework does not support Windows 95. All previously released OPC foundation
binaries that require the .NET Framework 1.0 will run on systems with only the
.NET Framework 1.1 installed. For this reason, users of OPC sample code should
never need to install .NET Framework 1.0 on a machine.</font></p>
<p class="MsoBodyText"><b><font face="Verdana" size="2"><a name="Installers"></a>Installers</font></b></p>
<p class="MsoBodyText"><font face="Verdana" size="2">The installer packages are
self-installing files; however, they require that Windows Installer 2.0 be
present on the system (it is standard on Windows 2000 SP3 and Windows XP). The
Windows Installer 2.0 support files for other operating systems can be
downloaded from Microsoft's website at:</font></p>
<p class="MsoBodyText" style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; TEXT-INDENT: 25px"><span class="MsoHyperlink"><font face="Verdana" size="2"><a href="http://www.microsoft.com/downloads/details.aspx?FamilyID=4b6140f9-2d36-4977-8fa1-6f8a0f5dca8f&DisplayLang=en"
target="_top">Download Windows Installer 2.0 Redistributable for Windows NT 4.0
and 2000</a><O:P>
</font></span></p>
<p class="MsoBodyText" style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; TEXT-INDENT: 25px"><span class="MsoHyperlink"><font face="Verdana" size="2"><a href="http://www.microsoft.com/downloads/details.aspx?FamilyID=cebbacd8-c094-4255-b702-de3bb768148f&DisplayLang=en"
target="_top">Download Windows Installer 2.0 Redistributable for Windows 95, 98
and ME</a></font></span></p>
<p class="MsoBodyText"><b><font face="Verdana" size="2"><a name="SourceCode"></a>Source
Code</font></b></p>
<p><span class="MsoHyperlink"><font face="Verdana" size="2"><span style="color: windowtext; text-decoration: none; mso-fareast-font-family: Times New Roman; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; text-underline: none">The
</span><span style="COLOR: windowtext; TEXT-DECORATION: none; mso-fareast-font-family: Times New Roman; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; text-underline: none">source code projects require
either Visual Studio 6.0 or Visual Studio .NET 2003.</span> </font></span>
<p><span class="MsoHyperlink"><font face="Verdana" size="2"><span style="COLOR: windowtext; TEXT-DECORATION: none; mso-fareast-font-family: Times New Roman; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; text-underline: none">Visual
Studio .NET 2003 can be installed along side both Visual Studio .NET
2002 and Visual Studio 6.0. Existing projects for older development
environments do not need to be upgraded in order to use sample code
distributed by the OPC Foundation. </span></font></span></p>
<p><font face="Verdana" size="2"><a name="Installation"></a></font><b><font face="Arial" size="3">Installation</font></b></p>
<p><b><font face="Verdana" size="2">Binaries</font></b></p>
<p style="mso-pagination: none; mso-layout-grid-align: none"><font face="Verdana" size="2"><span style="mso-fareast-font-family: Times New Roman"><o:p>
</span>The binaries installation consists of these files: </font>
</p>
<table border="1" width="100%" cellspacing="0" cellpadding="2">
<tr>
<td align="left" bgcolor="#000080" width="25%">
<p align="center" style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><b><font color="#ffffff" face="Verdana" size="2">File</font></b></p>
</td>
<td align="left" bgcolor="#000080">
<p align="center" style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><b><font color="#ffffff" face="Verdana" size="2">Description</font></b></p>
</td>
</tr>
<tr>
<td width="25%">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">OPCDAAuto.dll</font></p>
</td>
<td align="left">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">The
DA Automation Wrapper.</font></p>
</td>
</tr>
<tr>
<td width="25%">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">OpcDaAutoClient.exe</font></p>
</td>
<td align="left">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">A
sample client written with Visual Basic 6.0.</font></p>
</td>
</tr>
<tr>
<td width="25%">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">VbNetSampleClient.exe</font></p>
</td>
<td align="left">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">A
sample client written with Visual Basic .NET.</font></p>
</td>
</tr>
</table>
<p><b><font face="Verdana" size="2">Source Code</font></b></p>
<p class="MsoNormal"><span style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">The
source code for the C++ server and C# client applications are
installed by default in the directory:</span></p>
<p class="MsoNormal" style="TEXT-INDENT: 25px"><span style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana"><b>$(ProgramFiles)\OPC
Foundation\DA Automation 2.02</b></span></p>
<p style="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><span style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana">The
source code installation consists of the following key projects in the <i>'Source'</i> sub directory:</span></p>
<table border="1" width="887" cellspacing="0" cellpadding="2" height="109">
<tr>
<td align="left" bgcolor="#000080" width="315" height="16">
<p align="center" style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><b><font color="#ffffff" face="Verdana" size="2">File</font></b></p>
</td>
<td align="left" bgcolor="#000080" height="16" width="558">
<p align="center" style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><b><font color="#ffffff" face="Verdana" size="2">Description</font></b></p>
</td>
</tr>
<tr>
<td width="315" height="14">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">Data
Access\Automation\Wrapper</font></p>
</td>
<td align="left" height="14" width="558">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">An
ATL COM server that implements the DA Automation 2.02
specifications.</font></p>
</td>
</tr>
<tr>
<td width="315" height="16">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">Data
Access\Automation\Sample Client (VB6)</font></p>
</td>
<td align="left" height="16" width="558">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">A
VB 6.0 project that uses the DA Automation Wrapper.</font></p>
</td>
</tr>
<tr>
<td width="315" height="16">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">Data
Access\Automation\Sample Client</font></p>
</td>
<td align="left" height="16" width="558">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">A
VB .NET client application that uses the DA Automation
Wrapper. </font></p>
</td>
</tr>
<tr>
<td width="315" height="16">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">Data
Access\Automation\Sample Controls</font></p>
</td>
<td align="left" height="16" width="558">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">A
C# control library that is used by the VB .NET client
application.</font></p>
</td>
</tr>
</table>
<p><b><font face="Arial" size="3"><a name="Usage"></a>Usage</font></b></p>
<p><b><font face="Verdana" size="2">VB .NET Memory Management</font></b></p>
<p><font face="Verdana" size="2">The .NET runtime environment
manages COM object references differently from VB 6.0. Specifically,
setting an object explicitly to <i>Nothing</i> will not release a
COM server in VB .NET like it does in VB 6.0. As a result, users of
the automation wrapper in VB .NET will likely find that COM servers
are not being released when they expect. This will appear to be a
reference count problem in the VB client, however, it may not be a
concern since the .NET runtime environment is supposed to clean up
the references automatically when the memory is 'needed'.
Applications developers that do not wish to trust the .NET runtime
environment may use the <i>Marshal.</i><font SIZE="2"><i>ReleaseComObject</i>
</font>method to explicitly release COM servers.</font></p>
<p><b><font face="Verdana" size="2">OPCActivator</font></b></p>
<p><font face="Verdana" size="2">The default behavior of <i>CoCreateInstanceEx</i>
is not suitable for some DCOM applications that have specialized
security, licensing or network protocol requirements. As a result,
the DA Automation wrapper includes an object called <i>OPCActivator.
</i>This object allows VB applications to use vendor specific code
to instantiate the DCOM server and then create a new instance of an <i>OPCServer</i>
object that wraps an existing DCOM server instead of creating a new
instance. </font></p>
<p><b><font face="Verdana" size="2">Trace Log</font></b></p>
<p style="margin-bottom: 0"><font face="Verdana" size="2">The
automation wrapper logs events to an HTML file in the working
directory of the process that loads it. The log file name
contain executable name with '_OPCDAAuto_LOG.htm' appended to it. The content of these files is
controlled with registry entries contained in the following key:</font></p>
<p style="text-indent: 25px; margin-top: 10" align="left"><font face="Verdana" size="2"><b>HKEY_LOCAL_MACHINE\SOFTWARE\OPC
Foundation\OPCDAAuto\Trace \<Executable Name></b></font></p>
<table border="1" width="887" cellspacing="0" cellpadding="2">
<tr>
<td align="left" bgcolor="#000080" width="119" height="16">
<p align="center" style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><b><font color="#ffffff" face="Verdana" size="2">Value</font></b></p>
</td>
<td align="left" bgcolor="#000080" height="16" width="754">
<p align="center" style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><b><font color="#ffffff" face="Verdana" size="2">Purpse</font></b></p>
</td>
</tr>
<tr>
<td width="119" height="14">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">MaxEntries</font></p>
</td>
<td align="left" height="14" width="754">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">The
maximum number of entries that will be stored in the log
(default=10000)</font></p>
</td>
</tr>
<tr>
<td width="119" height="16" valign="top">
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font face="Verdana" size="2">TraceLevel</font></p>
</td>
<td align="left" height="16" width="754">
<p style="margin-top: 0px; margin-bottom: 10px"><font face="Verdana" size="2">A
bit mask indicating what types of data will be stored in the
log (default = 0x0000). </font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Verdana" size="2">The
bits are:</font></p>
<p style="margin-top: 0; margin-bottom: 0"> </p>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0001
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
any error messages.</font></p>
</font>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0002
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
additional detail about errors conditions.</font></p>
</font>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0004
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
any warning/informational messages.</font></p>
</font>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0008
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
additional detail about warning/informational conditions.</font></p>
</font>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0010
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
entry/exit from public functions.</font></p>
</font>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0020
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
before/after remote server calls.</font></p>
</font>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0040
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
in/out function parameters.</font></p>
</font>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font face="Verdana"><font SIZE="2">0x0080
</font><font SIZE="2" COLOR="#008000">// additional detail
about in/out function parameters (e.g. array contents).</font></font></p>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0100
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
any other information.</font></p>
</font>
<p style="margin-left: 25; margin-top: 0; margin-bottom: 0"><font SIZE="2" face="Verdana">0x0200
</font><font SIZE="2" COLOR="#008000"><font face="Verdana">//
additional detail about any other information.</font></font>
</td>
</tr>
</table>
<p><b><font face="Arial" size="3"><a name="NetApiMappings"></a>DA
Automation to .NET API Mappings</font></b></p>
<p><b><font face="Verdana" size="2"><a name="OPCServer"></a>OPCServer</font></b></p>
<table border="1" cellspacing="0" cellpadding="2" width="500">
<tr>
<td bgcolor="#000080" align="center"><font color="#FFFFFF" face="Verdana" size="2"><b>Existing
Property/ Method </b></font></td>
<td bgcolor="#000080" align="center"><b><font color="#FFFFFF" face="Verdana" size="2">.NET
API Equivalent</font></b></td>
</tr>
<tr>
<td>
<p class="MsoBodyText">StartTime</p>
</td>
<td rowspan="8">Opc.Da.Server.GetStatus</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">CurrentTime </p>
</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">LastUpdateTime </p>
</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">MajorVersion </p>
</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">MinorVersion </p>
</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">BuildNumber </p>
</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">VendorInfo </p>
</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">ServerState </p>
</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">LocaleID </p>
</td>
<td>Opc.Server.Locale</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">Bandwidth </p>
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">OPCGroups </p>
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">PublicGroupNames </p>
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">ServerName</p>
</td>
<td>Opc.Server.Name</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">ServerNode </p>
</td>
<td>Opc.Server.URL</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">ClientName </p>
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">GetOPCServers </p>
</td>
<td>OpcCom.ServerEnumerator</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">Connect </p>
</td>
<td>Opc.Server.Connect</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">Disconnect</p>
</td>
<td>Opc.Server.Disconnect</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">CreateBrowser</p>
</td>
<td>Opc.Da.Server.Browse</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">GetErrorString</p>
</td>
<td>Opc.Server.GetErrorString</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">QueryAvailableLocaleIDs</p>
</td>
<td>Opc.Server.SupportedLocales</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">QueryAvailableProperties</p>
</td>
<td>Opc.Da.Server.GetProperties</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">GetItemProperties</p>
</td>
<td>Opc.Da.Server.GetProperties</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">LookupItemIDs</p>
</td>
<td>Opc.Da.Server.Browse</td>
</tr>
<tr>
<td>
<p class="MsoBodyText">ServerShutDown</p>
</td>
<td>Opc.Server.ServerShutdown</td>
</tr>
</table>
<p><b><font face="Verdana" size="2"><a name="OPCBrowser"></a>OPCBrowser</font></b></p>
<table border="1" cellspacing="0" cellpadding="2" width="500">
<tr>
<td bgcolor="#000080" align="center"><font color="#FFFFFF" face="Verdana" size="2"><b>Existing
Property/Method </b></font></td>
<td bgcolor="#000080" align="center"><b><font color="#FFFFFF" face="Verdana" size="2">.NET
API Equivalent</font></b></td>
</tr>
<tr>
<td>
<p class="MsoBodyText">Organization
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
Filter
</td>
<td>Opc.Da.BrowseFilters</td>
</tr>
<tr>
<td>
DataType
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
AccessRights
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
CurrentPosition
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
Count
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
Item
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
ShowBranches
</td>
<td>Opc.Da.Server.Browse</td>
</tr>
<tr>
<td>
ShowLeafs
</td>
<td>Opc.Da.Server.Browse</td>
</tr>
<tr>
<td>
MoveUp
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
MoveToRoot
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
MoveDown
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
MoveTo
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
GetItemID
</td>
<td>Opc.Da.Server.Browse</td>
</tr>
<tr>
<td>
GetAccessPaths
</td>
<td>Opc.Da.Server.Browse</td>
</tr>
</table>
<p><b><font face="Verdana" size="2"><a name="OPCGroups"></a>OPCGroups</font></b></p>
<table border="1" cellspacing="0" cellpadding="2" width="500">
<tr>
<td bgcolor="#000080" align="center"><font color="#FFFFFF" face="Verdana" size="2"><b>Existing
Property/Method </b></font></td>
<td bgcolor="#000080" align="center"><b><font color="#FFFFFF" face="Verdana" size="2">.NET
API Equivalent</font></b></td>
</tr>
<tr>
<td>
<p class="MsoBodyText">Parent
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
DefaultGroupIsActive
</td>
<td>Opc.Da.SubscriptionState</td>
</tr>
<tr>
<td>
DefaultGroupUpdateRate
</td>
<td>Opc.Da.SubscriptionState</td>
</tr>
<tr>
<td>
DefaultGroupDeadband
</td>
<td>Opc.Da.SubscriptionState</td>
</tr>
<tr>
<td>
DefaultGroupLocaleID
</td>
<td>Opc.Da.SubscriptionState</td>
</tr>
<tr>
<td>
DefaultGroupTimeBias
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
Count
</td>
<td>Opc.Da.Server.Subscriptions.Count</td>
</tr>
<tr>
<td>
Item
</td>
<td>Opc.Da.Server.Subscriptions</td>
</tr>
<tr>
<td>
GetOPCGroup
</td>
<td>Opc.Da.SubscriptionCollection.Item</td>
</tr>
<tr>
<td>
Add
</td>
<td>Opc.Da.Server.CreateSubscription</td>
</tr>
<tr>
<td>
Remove
</td>
<td>Opc.Da.Server.CancelSubscription</td>
</tr>
<tr>
<td>
RemoveAll
</td>
<td>Opc.Da.Server.CancelSubscription</td>
</tr>
<tr>
<td>
ConnectPublicGroup
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
RemovePublicGroup
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
GlobalDataChange
</td>
<td>Not Supported</td>
</tr>
</table>
<p><b><font face="Verdana" size="2"><a name="OPCGroup"></a>OPCGroup</font></b></p>
<table border="1" cellspacing="0" cellpadding="2" width="500">
<tr>
<td bgcolor="#000080" align="center"><font color="#FFFFFF" face="Verdana" size="2"><b>Existing
Property/Method </b></font></td>
<td bgcolor="#000080" align="center"><b><font color="#FFFFFF" face="Verdana" size="2">.NET
API Equivalent</font></b></td>
</tr>
<tr>
<td>
<p class="MsoBodyText">Parent
</td>
<td>Opc.Da.Subscription.Server</td>
</tr>
<tr>
<td>
Name
</td>
<td>Opc.Da.Subscription.Locale</td>
</tr>
<tr>
<td>
IsPublic
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
IsActive
</td>
<td>Opc.Da.Subscription.Active</td>
</tr>
<tr>
<td>
IsSubscribed
</td>
<td>Opc.Da.Subscription.Enabled</td>
</tr>
<tr>
<td>
ClientHandle
</td>
<td>Opc.Da.Subscription.ClientHandle</td>
</tr>
<tr>
<td>
ServerHandle
</td>
<td>Opc.Da.Subscription.ServerHandle</td>
</tr>
<tr>
<td>
LocaleID
</td>
<td>Opc.Da.Subscription.Locale</td>
</tr>
<tr>
<td>
TimeBias
</td>
<td>Not Supported</td>
</tr>
<tr>
<td>
DeadBand
</td>
<td>Opc.Da.Subscription.Deadband</td>
</tr>
<tr>
<td>
UpdateRate
</td>
<td>Opc.Da.Subscription.UpdateRate</td>
</tr>
<tr>
<td>
OPCItems
</td>
<td>Not Required</td>
</tr>
<tr>
<td>
SyncRead
</td>
<td>Opc.Da.Subscription.Read</td>
</tr>
<tr>
<td>
SyncWrite
</td>
<td>Opc.Da.Subscription.Write</td>
</tr>
<tr>
<td>
AsyncRead
</td>
<td>Opc.Da.Subscription.Read</td>
</tr>
<tr>
<td>
AsyncWrite
</td>
<td>Opc.Da.Subscription.Write</td>
</tr>
<tr>
<td>
AsyncRefresh
</td>
<td>Opc.Da.Subscription.Refresh</td>
</tr>
<tr>
<td>
AsyncCancel
</td>
<td>Opc.Da.Subscription.Cancel</td>
</tr>
<tr>
<td>
DataChange
</td>
<td>Opc.Da.Subscription.DataChanged</td>
</tr>
<tr>
<td>
AsyncReadComplete
</td>
<td>Opc.Da.ReadCompleteEventHandler</td>
</tr>
<tr>
<td>
AsyncWriteComplete
</td>
<td>Opc.Da.WriteCompleteEventHandler</td>
</tr>
<tr>
<td>
AsyncCancelComplete
</td>
<td>Opc.Da.CancelCompleteEventHandler</td>
</tr>
</table>
<p><b><font face="Verdana" size="2"><a name="OPCItems"></a>OPCItems</font></b></p>
<table border="1" cellspacing="0" cellpadding="2" width="500">
<tr>
<td bgcolor="#000080" align="center"><font color="#FFFFFF" face="Verdana" size="2"><b>Existing
Property/Method </b></font></td>
<td bgcolor="#000080" align="center"><b><font color="#FFFFFF" face="Verdana" size="2">.NET
API Equivalent</font></b></td>
</tr>
<tr>
<td>
<p class="MsoBodyText">Parent
</td>
<td>Opc.Da.Subscription.Server</td>
</tr>
<tr>
<td>
DefaultRequestedDataType
</td>
<td>Opc.Da.Item</td>
</tr>
<tr>
<td>
DefaultAccessPath
</td>
<td>Opc.Da.Item</td>
</tr>
<tr>
<td>
DefaultIsActive
</td>
<td>Opc.Da.Item</td>
</tr>
<tr>
<td>
Count
</td>
<td>Opc.Da.Subscription.Items.Count</td>
</tr>
<tr>
<td>
Item
</td>
<td>Opc.Da.Subscription.Items</td>
</tr>
<tr>
<td>