var
Dummy : ildKbHook : HHook=0;
impementation
function KbHook( code: Integer; wparam: Word; lparam: LongInt ): LongInt; stdcall;
begin
if code<0 then Result:=CallNextHookEx( oldKbHook, code, wparam, lparam )
else Result:=1;
end;
procedure TForm1.KeyBoardOn(Sender: TObject);
begin
if OldKbHook <> 0 then begin
UnHookWindowshookEx( OldKbHook );
OldKbHook := 0;
end;
SystemParametersInfo( SPI_SETFASTTASKSWITCH, 0, 0, 0);
SystemParametersInfo( SPI_SCREENSAVERRUNNING, 0, 0, 0);
end;
procedure TForm1.KeyBoardOff(Sender: TObject);
begin
SystemParametersInfo( SPI_SETFASTTASKSWITCH, 1, @Dummy, 0);
SystemParametersInfo( SPI_SCREENSAVERRUNNING, 1, @Dummy, 0);
OldKbHook := SetWindowsHookEx( WH_KEYBOARD, @KbHook, HInstance, 0 );
end;