for 64 bit application it fails for APIs like GetPopupHandle, GetListContents etc.
in reply to Re^15: Trouble Installing Win32::GuiTest
in thread Trouble Installing Win32::GuiTest
I don't know whether that happens because all of the files you copied across have broken Ruben's compiler ... or whether its' something that's happening for other reasons.
If you like to provide a small script that demonstrates your problem on 64-bit perls (and is something that I could run), I'll give it a run (using my 64-bit compiler, which I know to be unbroken) and see if I get the same problem.
(Probably best to provide the demo in a new thread - I don't think there would be many people still following *this* thread.)