Windows - detectar se um aplicativo nao esta respondendo |
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{ // Translated from C to Delphi by Thomas Stutz // First published at www.SwissDelphiCenter.com // Original Code: // (c)1999 Ashot Oganesyan K, SmartLine, Inc // mailto:ashot@aha.ru, http://www.protect-me.com, http://www.codepile.com
The code doesn't use the Win32 API SendMessageTimout function to determine if the target application is responding but calls undocumented functions from the User32.dll.
--> For Windows 95/98/ME we call the IsHungThread() API
The function IsHungAppWindow retrieves the status (running or not responding) of the specified application
IsHungAppWindow(Wnd: HWND): // handle to main app's window BOOL;
--> For NT/2000/XP the IsHungAppWindow() API:
The function IsHungThread retrieves the status (running or not responding) of the specified thread
IsHungThread(DWORD dwThreadId): // The thread's identifier of the main app's window BOOL;
Unfortunately, Microsoft doesn't provide us with the exports symbols in the User32.lib for these functions, so we should load them dynamically using the GetModuleHandle and GetProcAddress functions: }
// For Win9x/ME function IsAppRespondig9x(dwThreadId: DWORD): Boolean; type TIsHungThread = function(dwThreadId: DWORD): BOOL; stdcall; var hUser32: THandle; IsHungThread: TIsHungThread; begin Result := True; hUser32 := GetModuleHandle('user32.dll'); if (hUser32 > 0) then begin @IsHungThread := GetProcAddress(hUser32, 'IsHungThread'); if Assigned(IsHungThread) then begin Result := not IsHungThread(dwThreadId); end; end; end;
// For Win NT/2000/XP function IsAppRespondigNT(wnd: HWND): Boolean; type TIsHungAppWindow = function(wnd:hWnd): BOOL; stdcall; var hUser32: THandle; IsHungAppWindow: TIsHungAppWindow; begin Result := True; hUser32 := GetModuleHandle('user32.dll'); if (hKernel > 0) then begin @IsHungAppWindow := GetProcAddress(hUser32, 'IsHungAppWindow'); if Assigned(IsHungAppWindow) then begin Result := not IsHungAppWindow(wnd); end; end; end;
function IsAppRespondig(Wnd: HWND): Boolean; begin if not IsWindow(Wnd) then begin ShowMessage('Incorrect window handle'); Exit; end; if Win32Platform = VER_PLATFORM_WIN32_NT then Result := IsAppRespondigNT(wnd) else Result := IsAppRespondig9X(GetWindowThreadProcessId(wnd,nil)); end;
// Example: Check if Word is hung/responing
procedure TForm1.Button3Click(Sender: TObject); var Res: DWORD; h: HWND; begin // Find Word by classname h := FindWindow(PChar('OpusApp'), nil); if h <> 0 then begin if IsAppRespondig(h) then ShowMessage('Word is responding') else ShowMessage('Word is not responding'); end else ShowMessage('Word is not open'); end; |