Thanks for your answer and the needed time. I replace all my code by yours and it still didn't work...That give me the idea to search for something else and I got it. I was using GetActiveWindow in order to get the handle of the current program...I know, it's not the best way...I will search for a better one later, time is running. During the init of the form, the GetActiveWindow returns the handle of Visual Studio and not the one of my program. So I was trying to register hotkeys for Visual Studio and it wasn't working. Well, thanks to you it's working fine now, I was gonna give up (too much time spent on it) My program should be ready for tomorrow with minimal features.:) Nd.

Thanks Leppie, I didn't know that. It wasn't working because I wasn't doing the registration with the right handle ! I was using GetForegroundWindow during form init, and at this moment, the handle is pointing to Visual Studio and not the launched application... Nd.

Well the virus isn't visible in the task manager list...At least, there is a difference...:) I have to recognize that old windows shouldn't be able to shutdown the computer. But W2000 and WinXP don't allow more processes creation after shutdown, so it's ok. Nd.

Just launch your application when you receive WM_DESTROY or WM_CLOSE. Your current program will be closed but you will have a new session in memory. I don't think MS wants it to be possible to hide processes from the task manager list. The API shouldn't have anything about this. Nd.