How to fully control keyboard + mouse?

[ahahaha]

I have a few questions:

• I want to know how do i control programs in stealth mode . I saw 1 program made with autoit (it had the autoit tray icon and autoit mark in the properties) that messed with yahoo messenger .. when i typed in a message to someone it sent other things. but it wasen't the "send" action because i would have seen that.
• I want to lock the mouse on a specific location on the keyboard while autoit works in other programs. I think the MouseMove funtion would be good for this (insert this between every 3 lines) but i need to "lock" the keyboard too. I don't want the user pressing ctrl+alt+del while autoit sends leftarrows and rightarrows scrolling between tabs. So is there any way to "block" the keys that the user presses?
• How do i start the default internet browsing software? (if the user uses Firefox as default software i don't want to start internet explorer.)

thx,bye

[AzKay]

Second point, maybe BlockInput(), But it doesnt block Ctrl Alt Dlt.

Third, ShellExecute()?

[ahahaha]

how about black out the screen? or turn off the monitor? i don't want the "victim" to see what i'm doing

[Jos]

victum ...... *click*