Loading a Windows dll via windows.h is not a simple task and is quite slow. The best solution for a few functions is to create you own header for the functions you wish to call and use that. For FindWindow this could just contain:
void * FindWindowA ( char* lpClassName , char * lpWindowName );
Note that the usable function from matlab is FindWindowA.
The reason you found no functions was that most of the functions in user32 are in the header "WinUser.h" which must be added with the addheader option to loadlibrary. I determined this by searching for FindWindow in all the windows headers. I was able to load many functions from user32.dll using this process:
- Create a prototype file: [nf,warn]=loadlibrary('user32.dll', 'C:\Program Files (x86)\Windows Kits\8.0\Include\um\windows.h','alias','user','includepath','C:\Program Files (x86)\Windows Kits\8.0\Include\um\','includepath','C:\Program Files (x86)\Windows Kits\8.0\Include\shared\','addheader','WinUser','mfilename','user_proto');
- Unload the library
- Edit the prototype file 'user_proto.m' to remove the first few functions that come through with calltypes of 'cdecl' and 'stdcall'
- Load the library:
[nf,warn]=loadlibrary('user32.dll', @user_proto,'alias','user');
In future MATLAB sessions only step 4 is needed.
