直接发送消息
SendMessage(Handle, WM_HOTKEY, Scr, MakeLParam(MOD_CONTROL or MOD_ALT or MOD_SHIFT, 90));
或者
var
Msg: TMessage;
begin
with Msg do
begin
Msg := WM_HOTKEY;
WParam := Scr;
LParamLo := MOD_CONTROL or MOD_ALT or MOD_SHIFT;
LParamHi := 90;
SendMessage(Handle, Msg, wParam, lParam);
end;
end;