Mouse & keyboard deactivate for some seconds?

Hello,

I hope i´m now in the right 'forum-part'.
It is possible in 'C' or'C++' to deactivate my mouse and my keyboard for a minute or some seconds. I know that i must deactivate the devices with some Rundll32.exe parameters. But how can i reactivate my mouse and the keyboard again?

thanks a lot

JoJo