怎样使自定义的gui窗口支持 WheelUp 和 WheelDown 映射？

showModal(){
IfWinExist Modal
{
Gui, Show,,Modal
}else{
Gui, +LastFound +AlwaysOnTop -Caption +ToolWindow +HwndMODAL_ID
Gui, Color, black, 000000
WinSet, Transparent, 1
Gui, Show, h2000 Center Maximize,Modal
}
}
hideModal(){
Gui, Hide
}
showModal() ;打开蒙板
F1::
showModal()
return
F2::
hideModal()
return
NumpadLeft::
Tooltip,1
return
NumpadRight::
Tooltip,2
return
WheelUp::
Tooltip,3
return
WheelDown::
Tooltip,4
return