; FIND COORDINATES BY DRAGGING A BOX OUT.  WORKS ON RIGHT CLICK MENUS AND START MENU WITHOUT DISPLAYING THE DRAGGED OUT BOX.
; FINDS INCORRECT COORDINATES?  THEY ARE SHIFTED DOWN ~50PX?
; "C:\Program Files (x86)\AutoIt3\AutoIt3_x64.exe" "C:\Program Files (x86)\AutoIt3\Include\Coordinates.au3"
; https://www.autoitscript.com/forum/topic/117114-capture-mouse-selection/?tab=comments#comment-816497
#include <GuiConstantsEx.au3>
#include <WindowsConstants.au3>
#Include <ScreenCapture.au3>
#Include <Misc.au3>

Global $iX1, $iY1, $iX2, $iY2, $aPos, $sMsg, $sBMP_Path

; Create GUI
$hMain_GUI = GUICreate("Select Rectangle", 240, 50)

$hRect_Button   = GUICtrlCreateButton("Mark Area",  10, 10, 80, 30)
$hCancel_Button = GUICtrlCreateButton("Cancel",    150, 10, 80, 30)

GUISetState()

While 1

    Switch GUIGetMsg()
        Case $GUI_EVENT_CLOSE, $hCancel_Button
            FileDelete(@ScriptDir & "Rect.bmp")
            Exit
        Case $hRect_Button
            GUISetState(@SW_HIDE, $hMain_GUI)
            Mark_Rect()
            ; Capture selected area
            MsgBox($MB_SYSTEMMODAL, "Coords", "Left: " & $iX1 & @CRLF & "Top: " & $iY1 & @CRLF & "Right: " & $iX2 & @CRLF & "Bottom: " & $iY2)

    EndSwitch

WEnd
exit 
; -------------

Func Mark_Rect()

    Local $aMouse_Pos, $hMask, $hMaster_Mask, $iTemp
    Local $UserDLL = DllOpen("user32.dll")

    ; Create transparent GUI with Cross cursor
    $hCross_GUI = GUICreate("Test", @DesktopWidth, @DesktopHeight - 20, 0, 0, $WS_POPUP, $WS_EX_TOPMOST)
    WinSetTrans($hCross_GUI, "", 8)
    GUISetState(@SW_SHOW, $hCross_GUI)
    GUISetCursor(3, 1, $hCross_GUI)

    Global $hRectangle_GUI = GUICreate("", @DesktopWidth, @DesktopHeight, 0, 0, $WS_POPUP, $WS_EX_TOOLWINDOW + $WS_EX_TOPMOST)
    GUISetBkColor(0x000000)

    ; Wait until mouse button pressed
    While Not _IsPressed("01", $UserDLL)
        Sleep(10)
    WEnd

    ; Get first mouse position
    $aMouse_Pos = MouseGetPos()
    $iX1 = $aMouse_Pos[0]
    $iY1 = $aMouse_Pos[1]

    ; Draw rectangle while mouse button pressed
    While _IsPressed("01", $UserDLL)

        $aMouse_Pos = MouseGetPos()

        $hMaster_Mask = _WinAPI_CreateRectRgn(0, 0, 0, 0)
        $hMask = _WinAPI_CreateRectRgn($iX1,  $aMouse_Pos[1], $aMouse_Pos[0],  $aMouse_Pos[1] + 1) ; Bottom of rectangle
        _WinAPI_CombineRgn($hMaster_Mask, $hMask, $hMaster_Mask, 2)
        _WinAPI_DeleteObject($hMask)
        $hMask = _WinAPI_CreateRectRgn($iX1, $iY1, $iX1 + 1, $aMouse_Pos[1]) ; Left of rectangle
        _WinAPI_CombineRgn($hMaster_Mask, $hMask, $hMaster_Mask, 2)
        _WinAPI_DeleteObject($hMask)
        $hMask = _WinAPI_CreateRectRgn($iX1 + 1, $iY1 + 1, $aMouse_Pos[0], $iY1) ; Top of rectangle
        _WinAPI_CombineRgn($hMaster_Mask, $hMask, $hMaster_Mask, 2)
        _WinAPI_DeleteObject($hMask)
        $hMask = _WinAPI_CreateRectRgn($aMouse_Pos[0], $iY1, $aMouse_Pos[0] + 1,  $aMouse_Pos[1]) ; Right of rectangle
        _WinAPI_CombineRgn($hMaster_Mask, $hMask, $hMaster_Mask, 2)
        _WinAPI_DeleteObject($hMask)
        ; Set overall region
        _WinAPI_SetWindowRgn($hRectangle_GUI, $hMaster_Mask)

        If WinGetState($hRectangle_GUI) < 15 Then GUISetState()
        Sleep(10)

    WEnd

    ; Get second mouse position
    $iX2 = $aMouse_Pos[0]
    $iY2 = $aMouse_Pos[1]

    ; Set in correct order if required
    If $iX2 < $iX1 Then
        $iTemp = $iX1
        $iX1 = $iX2
        $iX2 = $iTemp
    EndIf
    If $iY2 < $iY1 Then
        $iTemp = $iY1
        $iY1 = $iY2
        $iY2 = $iTemp
    EndIf

    GUIDelete($hRectangle_GUI)
    GUIDelete($hCross_GUI)
    DllClose($UserDLL)

EndFunc   ;==>Mark_Rect