在系統服務中與案頭進行互動編程實現

最進在寫服務端的代碼，裡面用到了FindWindow函數，卻找不到指定視窗，後來才知道服務中不與視窗打交道，要進行桌面視窗互動要用下面的方法來實現，記錄如下，以備後用

int Find()
{
 HWND hWndQQ = NULL;
 HWINSTA hstaSave;
 LPCWSTR lpStation = L"WinSta0";
 LPCWSTR lpDesk = L"default";
 HWINSTA hstaUser;
 
 HDESK hdeskSave;
 HDESK hdeskUser;

 hstaSave = GetProcessWindowStation();
 
    hstaUser = OpenWindowStation(lpStation,0,WINSTA_ALL_ACCESS);
 
 SetProcessWindowStation(hstaUser);

 hdeskSave = GetThreadDesktop(GetCurrentThreadId());

 hdeskUser = OpenDesktop(lpDesk, 0, FALSE, DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW | DESKTOP_ENUMERATE | DESKTOP_HOOKCONTROL | DESKTOP_JOURNALPLAYBACK | DESKTOP_JOURNALRECORD | DESKTOP_READOBJECTS | DESKTOP_SWITCHDESKTOP | DESKTOP_WRITEOBJECTS);
 if (hdeskUser == NULL)
 {
  OutputDebugStringA("Open desktop Failed!");
 
 }
 SetThreadDesktop(hdeskUser);

 ////////////////////////這裡添加與視窗互動的代碼///////////////////////////
 hWndQQ = FindWindow(L"WINDOWAPI", L"WindowAPI");
 if(hWndQQ != NULL)
 {
  OutputDebugStringA("Find Window Success!");
 }
 else
 {
  OutputDebugStringA("Find Window Falied!");
 }

 SetThreadDesktop(hdeskSave);
 SetProcessWindowStation(hstaSave);
 CloseDesktop(hdeskUser);
 CloseWindowStation(hstaUser);
}

 

 

//////////////////////////////參考原文///////////////////////////////////////////////////////

HWINSTA hstaSave = GetProcessWindowStation();
LPCWSTR lpStation = {_T("WinSta0")};
HWINSTA hstaUser = OpenWindowStation(lpStation,0,WINSTA_ALL_ACCESS);
if (hstaUser == NULL)
{
LPCTSTR lpszMsg[] = {_T("Open windowstation Failed!")};
LogEvent(EVENTLOG_INFORMATION_TYPE, MPC_DOGSRV_EXTSVCSHUTDOWN, 1, lpszMsg);
return NULL;
}
SetProcessWindowStation(hstaUser);

HDESK hdeskSave = GetThreadDesktop(GetCurrentThreadId());
LPCWSTR lpDesk = {_T("default")};
HDESK hdeskUser = OpenDesktop(lpDesk, 0, FALSE, DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW | DESKTOP_ENUMERATE | DESKTOP_HOOKCONTROL | DESKTOP_JOURNALPLAYBACK | DESKTOP_JOURNALRECORD | DESKTOP_READOBJECTS | DESKTOP_SWITCHDESKTOP | DESKTOP_WRITEOBJECTS); 
if (hdeskUser == NULL) 
{
LPCTSTR lpszMsg[] = {_T("Open desktop Failed!")};
LogEvent(EVENTLOG_INFORMATION_TYPE, MPC_DOGSRV_EXTSVCSHUTDOWN, 1, lpszMsg);
return NULL; 
}
SetThreadDesktop(hdeskUser);

if (!EnumWindows(EnumWindowsProc, (LPARAM)&wi))
{
LPCTSTR lpszMsg[] = {_T("EnumWindows Failed!")};
LogEvent(EVENTLOG_INFORMATION_TYPE, MPC_DOGSRV_EXTSVCSHUTDOWN, 1, lpszMsg);
}

if (!wi.hWnd) //這裡仍然擷取不到使用者登入介面的視窗。
{
CString strMsg;
strMsg.Format(_T("wi.hWnd is null! ProcessId:%d"),wi.dwProcessId);
LPCTSTR lpszMsg[] = {strMsg};
LogEvent(EVENTLOG_INFORMATION_TYPE, MPC_DOGSRV_EXTSVCSHUTDOWN, 1, lpszMsg);
}

SetThreadDesktop(hdeskSave); 
SetProcessWindowStation(hstaSave);
CloseDesktop(hdeskUser); 
CloseWindowStation(hstaUser);