UINT GetWindowModuleFileName (HWND   hwnd,
                              LPTSTR lpszFileName,
                              UINT   cchFileNameMax);  



BOOL MyGetWindowExeFilename (HWND hWnd, 
                             char * pszFilename, 
                             int iSizeofBuff) 
{
   HANDLE  hProc; 
   HMODULE ahMod [10];
   DWORD   dwNeeded; 
   DWORD   dwPid;
   BOOL    bResult = FALSE;

   // Get PID corresponding to this window handle. 
   GetWindowThreadProcessId (hWnd, &dwPid); 

   hProc = OpenProcess (PROCESS_QUERY_INFORMATION|PROCESS_VM_READ, 
                        FALSE, 
                        dwPid); 
   if (hProc) 
   { 
      if (EnumProcessModules (hProc, 
                              ahMod, 
                              sizeof(ahMod), 
                              &dwNeeded)) 
      { 
         // we're only interested in the first module.
         if (GetModuleBaseName (hProc, 
                                ahMod[0], 
                                pszFilename, 
                                iSizeofBuff)) 
         { 
            bResult = TRUE;
         } 
      } 
      CloseHandle (hProc); 
   } 
   return bResult;
}