Is it possible to conditionally hide Launch button.

[lukeskrz]

Hello,

I'm using v3.11.2 of the toolset, and trying to figure out if it is possible to conditionally hide the "Launch" button on the success page of the WixStandardBootstrapperApplication using RtfLargeLicense?
Looking through the source it looks like the button is enabled/visible if the LaunchTarget variable exists and contains at least one character.
I had considered defining the LaunchTarget variable in my bundle with a default path and making it overridable
<Variable Name="LaunchTarget" Value="[InstallLocation]\$(var.ProductName)\$(var.ExeName)" bal:Overridable="yes" />
with the idea that I could pass LaunchTarget= on the command line to turn it off.

I see in the logs the LaunchTarget variable does get set to '' when I pass in the command line, but the button then still appears.

Is there anyway this could be configured to work?

[rseanhall]

I expected your approach to work. You didn't provide a fully reproducible example so the error is probably in something you haven't explained here.

Is overriding the variable on the command line good enough or were you looking for something different? A new feature probably wouldn't be added to v3.x but it could be added for v4.

[lukeskrz]

Thanks for the response.
Here's a simple example bootstrapper and dummy MSI. By default if you click the Launch button it executes notepad.
I can call it like BootstrapperTest LaunchTarget=cmd.exe to have it launch the cmd window instead.
However, if I run BootstrapperTest LaunchTarget= the Launch button is still visible.

BootstrapperTest.zip

Overriding the command line would probably be enough, although I have found a workaround with having the button launch a small helper process that launches my application in the correct manner.

[rseanhall]

Looks like the comment in BalStringVariableExists is wrong, a string variable with a value of an empty string will still return E_MOREDATA because cch includes 1 for the null terminator character. You'll have to write a BAFunctions dll in order to undefine the variable (set the string value to NULL) in v3.

[lukeskrz]

Ah ok. Thanks for your help.