#Include <_Struct>
~Shift::MouseKeys(0) ;Disable MOUSEKEYS
~Shift UP::MouseKeys(1) ;Enable MOUSEKEYS
^!Space::MsgBox % "MouseKeys are " (MouseKeys(-1) ? "On" : "Off")

Numpad2::MsgBox

MouseKeys(OnOff=0){
	static MOUSEKEYS:="DWORD cbSize,DWORD dwFlags,DWORD iMaxSpeed,DWORD iTimeToMaxSpeed,DWORD iCtrlSpeed,DWORD dwReserved1,DWORD dwReserved2"
			,SPI_GETMOUSEKEYS:=0x0036,SPI_SETMOUSEKEYS:=0x0037
	MK:=Struct(MOUSEKEYS),MK.cbSize:=Struct(MK)
	DllCall("SystemParametersInfo", UInt, SPI_GETMOUSEKEYS, "UInt", MK.cbSize, "UInt", MK[""], "UInt", 0)
	If OnOff=-1
		MK.dwFlags:=MK.dwFlags+((MK.dwFlags & 1)?-1:1)
	else if OnOff
		MK.dwFlags:=MK.dwFlags+((MK.dwFlags & 1)?0:1)
	else
		MK.dwFlags:=MK.dwFlags+((MK.dwFlags & 1)?-1:0)
	Loop 2
		DllCall("SystemParametersInfo", UInt, Mod(A_Index,2)?SPI_SETMOUSEKEYS:SPI_GETMOUSEKEYS, "UInt", MK.cbSize, "UInt", MK[""], "UInt", 0)
	Return (MK.dwFlags & 1)
}