How to blurred window with rounded corners?

[UE_morf_boon]

Hey. I'm trying to add blur to a rounded window.

I'm using blur from this topic:

But it doesn't work with rounded corners. I think the problem is that the user32.dll library is called twice.

Code: 

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#Include <GUIConstantsEx.au3>
#Include <WindowsConstants.au3>
#Include <WinAPI.au3>
#include "_WinAPI_DwmEnableBlurBehindWindow10.au3"

$hForm2 = GUICreate("MyGUI", 300, 370, -1, -1, $WS_POPUP)
;_WinAPI_DwmEnableBlurBehindWindow10($hForm2)
GUISetBkColor(0x000000)
GUICtrlSetBkColor(-1, 0x000000)
_Corners($hForm2,0,0,300,370,30,30)
GUICtrlCreateLabel('',0,0,400, 25,-1,$GUI_WS_EX_PARENTDRAG)
$close = GUICtrlCreateButton("exit",20,40,80,25)
GUIRegisterMsg($WM_MOVE, 'WM_MOVE')
GUISetState(@SW_SHOW, $hForm2)

While 1
    $msg = GUIGetMsg()
    Select
        Case $msg = $GUI_EVENT_CLOSE
            ExitLoop
        Case $msg = $close
            Exit
    EndSelect
WEnd
Exit

Func _Corners($hWnd,$x1,$y1,$x2,$y2,$x3,$y3)
$pos = WinGetPos($hWnd)
$ret = DllCall("gdi32.dll", "long", "CreateRoundRectRgn", "long", $x1, "long", $y1, "long", $x2, "long", $y2, "long",$x3, "long", $y3)
If $ret[0] Then
    $ret2 = DllCall("user32.dll", "long", "SetWindowRgn", "hwnd", $hWnd, "long", $ret[0], "int", 1)
    If $ret2[0] Then
        Return 1
    Else
        Return 0
    EndIf
EndIf
EndFunc

Func WM_MOVE($hWnd, $iMsg, $wParam, $lParam)
    Switch $hWnd
        Case $hForm2
            Local $Pos = WinGetPos($hForm2)
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc

Please help me combine these two solutions or find an analogue.

Edited January 18, 2021 by UE_morf_boon

[UE_morf_boon]

Bump.

I found this page "social.msdn.microsoft.com", but I don't know how to apply that to a solution. Can anyone help?

[DeanJGrey]

Also trying to figure this out. Can't get the 'DWMAPI' to apply a blur effect on Windows 10, and on the other hand, 'SetWindowCompositionAttribute' won't allow shapes or regions.

Can't wait to figure it out.