Stopping Keystrokes

Hi,im a fairly new vb programmer and i was curious....
is there a way to actualy STOP people from using keystrokes like alt-f4,ctrl-alt-delete,[windows key] etc....

any response would be appreceated

VB Code:

Private Declare Function BlockInput _
    Lib "user32" _
    (ByVal fBlock As Long) As Long
 
Private Sub DoSomething()
    'Turn off keyboad and mouse
    BlockInput True
    
    'do your stuff here
    
    'Turn on keyboad and mouse
    BlockInput False
End Sub