how to send a Alt+A message to a window

[Tony He]

I want to send a Alt +A message to a Window, like this: dwTID = GetWindowThreadProcessId(handle,&dwPID); ::PostThreadMessage(dwTID, WM_SYSKEYDOWN, 'A', 0x20000001); ::PostThreadMessage(dwTID, WM_SYSKEYUP, 'A', 0x20000001); it can't work. when i chang the prog like this ::SetForegroundWindow(handle); keybd_event(VK_MENU, 0, KEYEVENTF_EXTENDEDKEY | 0, 0); keybd_event('A', 0, KEYEVENTF_EXTENDEDKEY | 0, 0); keybd_event(VK_MENU, 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0); keybd_event('A', 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0); it 's ok.why? and i want't to put the window on foreground,how to do it? thanks alot!

[lzzqqq]

:)i think that the message can't translate data with two process. so the first method is failed.