如何在Windows上获取Active Desktop类型？

Question

My software (a service coded in cpp) needs to know which desktop is active currently:

1. Winlogon desktop
2. Application desktop
3. Screen saver desktop

I have the code for registering WTS_SESSION_CHANGE but that only works when the session is switched. Is there any way to know after power-on if the current screen is still WinLogon?

The purpose of this is to display a Messagebox in the correct desktop through a child process in user mode.

Answer 1

得到了解决方案..比较了GetThreadDesktop（）和OpenInputDesktop（）的名称是否起作用（在用户进程内部）。