In msdn, there is a classic codes “Interacting with the User in a
Service”. I call it as this:
UserMessageBox(NULL, “winsta0”, “default”, “myWindow”, NULL, MB_OK); It
works well.
But in vista, I found it don’t work. So, everyone, in vista, who can
tell me how can I interact with service?
DWORD dwGuiThreadId = 0;
int
UserMessageBox(
RPC_BINDING_HANDLE h,
LPSTR lpszWindowStation,
LPSTR lpszDesktop,
LPSTR lpszText,
LPSTR lpszTitle,
UINT fuStyle)
{
DWORD dwThreadId;
HWINSTA hwinstaSave;
HDESK hdeskSave;
HWINSTA hwinstaUser;
HDESK hdeskUser;
int result;
// Ensure connection to service window station and desktop, and
// save their handles.
GetDesktopWindow();
hwinstaSave = GetProcessWindowStation();
dwThreadId = GetCurrentThreadId();
hdeskSave = GetThreadDesktop(dwThreadId);
// Impersonate the client and connect to the User’s
// window station and desktop.
RpcImpersonateClient(h);
hwinstaUser = OpenWindowStation(lpszWindowStation, FALSE,
MAXIMUM_ALLOWED);
if (hwinstaUser == NULL)
{
RpcRevertToSelf();
return 0;
}
SetProcessWindowStation(hwinstaUser);
hdeskUser = OpenDesktop(lpszDesktop, 0, FALSE, MAXIMUM_ALLOWED);
RpcRevertToSelf();
if (hdeskUser == NULL)
{
SetProcessWindowStation(hwinstaSave);
CloseWindowStation(hwinstaUser);
return 0;
}
SetThreadDesktop(hdeskUser);
// Display message box.
dwGuiThreadId = dwThreadId;
result = MessageBox(NULL, lpszText, lpszTitle, fuStyle);
dwGuiThreadId = 0;
// Restore window station and desktop.
SetThreadDesktop(hdeskSave);
SetProcessWindowStation(hwinstaSave);
CloseDesktop(hdeskUser);
CloseWindowStation(hwinstaUser);
return result;
}
