Thanks for the advice, but reading MSDN I found somethig
to disable some buttons for VB and was trying to do the
same with VFP.

I just want to have more control over the application,
because some user's just dont read what's in front of
their nose, and some user's press CTRL + ALT + DEL (twice)
and we all know what happens !

I found This:
Declare Integer SystemParametersInfo ;
In user32 As SystemParametersInfo ;
Integer uAction , ;
Integer uParam ,;
String lpvParam ,;
Integer fuWinIni

* Disable Buttons Ctrl + Esc & Alt + Tab & Ctrl + Alt + Del
=SystemParametersInfo( 97, 1, 0, 0)

wait windows "Buttons 'Ctrl+Esc' & 'Crtl+Tab' & 'Ctrl+Alt+Del' Disable" timeout 3

* Enable
=SystemParametersInfo( 97, 0, 0, 0)
wait windows "Buttons Enable" timeout 3

But it doesn't work !!

Why ?

Could someonem help me please.
TIA