pixelsearch and click right pixel - autohotkey

Question

IF NOT A_IsAdmin ; Runs script as Admin.
{
Run *RunAs "%A_ScriptFullPath%"
ExitApp
}
#MaxThreadsPerHotkey, 2
CoordMode, Pixel, Screen
#singleInstance, Force
toggle = 0
upperLeftX := 750
upperLeftY := 400
lowerRightX := 850
lowerRightY := 500
F8:: ; press F8 to toggle the loop on/off.
SoundBeep
Toggle := !Toggle
While Toggle
{ ;-- Begin of loop.
PixelSearch, X, Y,%upperLeftX%, %upperLeftY%, %lowerRightX%, %lowerRightY%, 0x000000, 0, Fast RGB
IF ErrorLevel = 1 ; IF NOTFound.
{
sleep, 100
}
IF ErrorLevel = 0 ; IF Found.
{
MouseClick, left
sleep, 300
}
} ;-- End of Loop.
return
F8 starts loop and this code checks specific pixel in rectangle and sends left click.
It works with [MouseClick, left, %X%, %Y%].But I want to know how can I use dllcall mouse event to click on specific pixel.
for example
DllCall("mouse_event",uint,1,int,%X%,int,%Y%,uint,0,int,0)
But its not working

Answer 1

I doubt that you actually want to do this via DLL calls. mouse_event doesn't even take coordinates, but values between 0-65535.
If you want to be able to click any pixel on the screen make sure you set it to be relative to the screen: CoordMode, Mouse, Screen
Then use ControlClick/PostMessage/SendMessage if you don't want to affect your mouse pointer by that click. Or use MouseClick/Click. Or MouseMove+Send, {LButton}.