I don't think you are factoring in the offset with your X/Y coords. Try the script below. It will get the coords and copy them to the clipboard. Change the first $Title line to match the title of your BlueStacks.
The F1 key will get the coords, taking into account the offset, of wherever you click.
Code:
#include <Misc.au3>
#include <WinAPI.au3>
Global $BSpos[2] ; Inside BlueStacks positions relative to the screen
$Title = "BlueStacks App Player for Windows (beta-1)" ; Window name
$Full = WinGetTitle ($Title) ; Get The Full Title..
$HWnD = WinGetHandle ($Full) ; Get The Handle
WinActivate ($HWnD)
Func getBSPos()
$aPos = ControlGetPos($Title, "", "[CLASS:BlueStacksApp; INSTANCE:1]")
$tPoint = DllStructCreate("int X;int Y")
DllStructSetData($tPoint, "X", $aPos[0])
DllStructSetData($tPoint, "Y", $aPos[1])
_WinAPI_ClientToScreen(WinGetHandle(WinGetTitle($Title)), $tPoint)
$BSpos[0] = DllStructGetData($tPoint, "X")
$BSpos[1] = DllStructGetData($tPoint, "Y")
EndFunc ;==>getBSPos
HotKeySet ("{F7}", "FindPos")
HotKeySet ("{F8}", "Terminate")
While 1
Sleep (100)
WEnd
Func FindPos()
getBSPos()
Local $Pos[2]
Local $iColour = 0
While 1
If _IsPressed("01") Then
$Pos[0] = MouseGetPos()[0] - $BSpos[0]
$Pos[1] = MouseGetPos()[1] - $BSpos[1]
$iColour = Hex (PixelGetColor($Pos[0],$Pos[1]),6)
ClipPut($Pos[0] & "," & $Pos[1] & "," & $iColour)
Return $Pos
EndIf
WEnd
EndFunc ;==>FindPos
Func Terminate()
Exit
EndFunc ;==>Terminate