GUI Rounded corners with a 1px border on a popup+resizebox gui

[ame1011]

lol I hope that's not too much to ask

I have the following code:

expandcollapse popup

#include <GuiConstantsEx.au3>
#include <WindowsConstants.au3>
#include <WinAPI.au3>

Global Const $PS_SOLID = 0

$hGUI = GUICreate("TEST", 500, 500, -1, -1, BitOR($WS_POPUP, $WS_SIZEBOX))
_GuiRoundCorners($hGUI, 0, 0, 10, 10)
GUISetBkColor(0xEFEFEF)

GUIRegisterMsg($WM_NCPAINT, "WM_NCPAINT")
GUISetState(@SW_SHOW, $hGUI)

while 1
    $msg = GUIGetMsg()
    Select
        Case $msg = $GUI_EVENT_CLOSE
            Exit
    EndSelect
WEnd

Func WM_NCPAINT($hWnd, $Msg, $wParam, $lParam)
    Local $hDC, $hPen, $OldPen, $OldBrush, $aHwndPos
   
    $hDC = _WinAPI_GetWindowDC($hWnd)
   
    $hPen = DllCall("gdi32.dll", "hwnd", "CreatePen", "int", $PS_SOLID, "int", 1, "int", 0x3F3F3F)
    $hPen = $hPen[0]
   
    $OldPen = _WinAPI_SelectObject($hDC, $hPen)
    $OldBrush = _WinAPI_SelectObject($hDC, _WinAPI_GetStockObject($NULL_BRUSH))
   
    $aHwndPos = WinGetPos($hWnd)
   
    DllCall("gdi32.dll", "int", "Rectangle", "hwnd", $hDC, "int", 1, "int", 1, "int", $aHwndPos[2], "int", $aHwndPos[3])
   
    _WinAPI_SelectObject($hDC, $OldBrush)
    _WinAPI_SelectObject($hDC, $OldPen)
    _WinAPI_DeleteObject($hPen)
    _WinAPI_ReleaseDC($hWnd, $hDC)
   
    Return True
EndFunc
Func _GuiRoundCorners($h_win, $i_x1, $i_y1, $i_x3, $i_y3); thanks gafrost
    Local $XS_pos, $XS_ret, $XS_ret2
    $XS_pos = WinGetPos($h_win)
    $XS_ret = DllCall("gdi32.dll", "long", "CreateRoundRectRgn", "long", $i_x1, "long", $i_y1, "long", $XS_pos[2], "long", $XS_pos[3], "long", $i_x3, "long", $i_y3)
    If $XS_ret[0]Then
        $XS_ret2 = DllCall("user32.dll", "long", "SetWindowRgn", "hwnd", $h_win, "long", $XS_ret[0], "int", 1)
    EndIf
EndFunc  ;==>_GuiRoundCorners

I got both functions seperately on the forums, however when put together they don't really play nicely.

There are two problems with this:

1) there is a 1px space between the border and the gui, allowing you to see what's behind the gui

2)when the rounded corners was added the right side of the border broke

anyone have any idea how to accomplish this?