Under the NT Kernel, the lParam of the WM_ACTIVATE is always 0 because applications have their own virtual memory space.
Try using a named semaphore (this is from 10+ year old memory). Tom -----Original Message----- From: delphi-boun...@elists.org [mailto:delphi-boun...@elists.org] On Behalf Of Wilfried Mestdagh Sent: Wednesday, August 19, 2009 08:13 To: Borland's Delphi Discussion List Subject: WM_ACTIVATE Hello, I read in windows API help: WM_ACTIVATE fActive = LOWORD(wParam); // activation flag fMinimized = (BOOL) HIWORD(wParam); // minimized flag hwndPrevious = (HWND) lParam; // window handle But when I make a custom message handler in my main form for the WM_ACTIVATE then lParam is always 0. I need to find the handle of the previous active application. Any idea? rgds, Wilfried __________ Information from ESET NOD32 Antivirus, version of virus signature database 4349 (20090819) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com _______________________________________________ Delphi mailing list -> Delphi@elists.org http://lists.elists.org/cgi-bin/mailman/listinfo/delphi
