Trove Background Click and ClickDrag Functions For AHK

I present to you the 2 functions I made for clicking and click-dragging in trove while the window is not focused.
It's not perfect and I can't guarantee that it will work in all situations but seems to work pretty well for me.

Enjoy you freeloaders.


BackgroundClick(x, y, messageDelay, PID) {

lParam := x | (y << 16)

SendMessage, 0x006, 00000002, 00000000, , ahk_pid %PID% ;ACTIVE
PostMessage, 0x200, 00000001, %lParam%, , ahk_pid %PID% ;MOUSEMOVE

PostMessage, 0x201, 0x00120BD6, 0x01D80041, , ahk_pid %PID% ;LBUTTONDOWN
Sleep, %messageDelay%
PostMessage, 0x202, 0x00120BD6, 0x01D80041, , ahk_pid %PID% ;LBUTTONUP

return
}

BackgroundClickDrag(startX, startY, endX, endY, messageDelay, PID) {
;MessageDelay is used twice because we are using 3 messages that use the mouse

lParam := startX | (startY << 16)

SendMessage, 0x006, 00000002, 00000000, , ahk_pid %PID% ;ACTIVE

PostMessage, 0x200, 00000001, %lParam%, , ahk_pid %PID% ;MOUSEMOVE

PostMessage, 0x201, 00000001, %lParam%, , ahk_pid %PID% ;LBUTTONDOWN
Sleep, %messageDelay%
lParam := endX | (endY << 16)
PostMessage, 0x200, 0x0001, %lParam%, , ahk_pid %PID% ;MOUSEMOVE
Sleep, %messageDelay%
PostMessage, 0x202, 00000000, 02020001, , ahk_pid %PID% ;LBUTTONUP

return
}

Could you please tell me how to locate and specify coordinates for the programme? I have a coordinate script but not sure if its the same for this ahk script. The check coordinate script I uses is simple:

CoordMode, Mouse, Screen
SetTimer, Check, 20
return

Check:
MouseGetPos, xx, yy
Tooltip %xx%`, %yy%
return

Esc::ExitApp

To use the funtion, BackgroundClick(x, y, messageDelay, PID). The x and y are coordinates. What is message delay and PID

Wow, I got it working really good. Just 1 last question to clear things up. Using windows spy, I see 3 coordinates for mouse position: screen, window and client. Which one of these things should I be using?