Takhir
18th February 2004 10:14 UTC

FindWindow for Dialogs
I'd like to send wm_close to my app on both install and uninstall. The problem - it is simple dialog-based app., so window class "#32770" is not unique. For example NSIS installer Modern UI windows are dialogs too. Even more - all NSIS windows have application name in title, but I'd like to keep them running :-)) Additional difficulty - in my app window title only first part (program name) is fixed.

I have idea to use GetWindowLong(GWL_USERDATA) to be sure with wm_close, but is it possible in NSIS? Any other ideas?

Joost Verburg
18th February 2004 10:53 UTC

You can call Windows API using the System plug-in. For a tutorial see appendix C of the Users Manual.

deguix
18th February 2004 10:56 UTC

Using WinSpy you can find the real window class name of any window.

Takhir
18th February 2004 12:55 UTC

I need to check all top level dialog boxes, this works in FindWindowEx(), but script loops... Every next FindWindow should begin from start after current handle. This is my script

Function .onInit
loop:
FindWindow $0 "#32770" "" 0 $0
IntCmp $0 0 done
IsWindow $0 0 done
System::Call "user32::GetWindowLong(i $0, i -21) i.r0"
IntCmp r0 0xFF00FF00 0 loop loop
SendMessage $0 0x0010 0 0
goto loop
done:
FunctionEnd

eccles
18th February 2004 14:02 UTC

Your System call is overwriting $0 with the GetWindowLong result.

Try changing

System::Call "user32::GetWindowLong(i $0, i -21) i.r0"
IntCmp r0 0xFF00FF00 0 loop loop

System::Call "user32::GetWindowLong(i r0, i -21) i.r1"
IntCmp $1 0xFF00FF00 0 loop loop

Takhir
18th February 2004 14:14 UTC

Thanks a lot eccles!