moved

i moved it somewhere else

The task manager icon is still displayed in the system tray, which can be right-clicked and
closed, which re-enables CTRL ALT DEL.
What does the loop do by the way, I'm new to this API but doesn't it just keep checking for the windows existence?

yes it does.

since i minimized the amount of code space i just said that when the tesk meneger popsup my application will hide it.

so when i tryed it i found it puts it in the system tray.

so yes the loop indeed make shore that everytime someone will try bringing it back either doing "Ctrl" + "Alt" + "Del" or cliking on the icon in sys tray it will keep on hiding untill my code hasbeen disable.

your code wont hide it...all it does is find the window until it closes itself.

Sorry: that doesn't disable Ctrl+Alt+Del at all, all that does is waste CPU time.