Shows how to create a menu button with Fl_Menu_Button widget.
To build this project, open "Terminal" and type following lines:
mkdir build && cd build
cmake ..
start Menu_Button.sln
Select Menu_Button project and type Ctrl+F5 to build and run it.
mkdir build && cd build
cmake .. -G "Xcode"
open ./Menu_Button.xcodeproj
Select Menu_Button project and type Cmd+R to build and run it.
mkdir build && cd build
cmake ..
cmake --build . --config Debug
./Menu_Button