How can I make a window over a screensaver?

[swc1000]

I am developing an application with VC++6.0
My application must be shown always even though a screensaver is worked.
How can I do that?

[DangCongWei]

When a screen saver is to be shown, The active application receives the WM_SYSCOMMAND message with the wParam parameter set to the SC_SCREENSAVE value, if the window proc does not pass this message to the DefWindowProc, the screen saver will not be shown.The detail informatin lies in :
VC6 Msdn\Platform SDK\User Interface servics\Shell and common controls\Windows shell Api\Screen Saver Library
But if you want to dispaly you forms upon the screen saver's view --- I don't know how to do it, sorry!