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Как включать/выключать лампочки на numlock, capslock
procedure SetNumLock(bState:Boolean);
var
KeyState : TKeyboardState;
begin
GetKeyboardState(KeyState);
if ( (bState) and (not ((KeyState[VK_NUMLOCK] and 1)=1) ) or
( (not (bState)) and ((KeyState[VK_NUMLOCK] and 1)=1))) then
// Simulate a key press
keybd_event(VK_NUMLOCK, $45, (KEYEVENTF_EXTENDEDKEY or 0), 0);
// Simulate a key release
keybd_event( VK_NUMLOCK, $45, (KEYEVENTF_EXTENDEDKEY or
KEYEVENTF_KEYUP), 0);
end;
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