Как скомбинировать 6 регионов? - VB

Формулировка задачи:

Скажите, пожалуйста, как скомбинировать 6 регионов.

Решение задачи: «Как скомбинировать 6 регионов?»

textual
                            Листинг программы 
                        
                            Option Explicit
 
Private Declare Function CombineRgn Lib "gdi32" (ByVal hDestRgn As Long, ByVal hSrcRgn1 As Long, ByVal hSrcRgn2 As Long, ByVal nCombineMode As Long) As Long
Private Declare Function SetWindowRgn Lib "user32" (ByVal hWnd As Long, ByVal hRgn As Long, ByVal bRedraw As Long) As Long
Private Declare Function CreateEllipticRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long
Private Declare Function OffsetRgn Lib "gdi32" (ByVal hRgn As Long, ByVal x As Long, ByVal y As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
 
Private Const RGN_OR    As Long = 2
Private Const RGN_XOR   As Long = 3
 
Private Sub Form_Load()
    Dim hRgn1   As Long
    Dim hRgn2   As Long
    
    ScaleMode = vbPixels
    
    hRgn1 = CreateEllipticRgn(0, 0, ScaleWidth \ 2, ScaleHeight \ 2)
    hRgn2 = CreateEllipticRgn(ScaleWidth \ 2, 0, ScaleWidth, ScaleHeight \ 2)
    
    CombineRgn hRgn1, hRgn1, hRgn2, RGN_OR
    
    OffsetRgn hRgn2, 0, ScaleHeight \ 2
    
    CombineRgn hRgn1, hRgn1, hRgn2, RGN_OR
    
    OffsetRgn hRgn2, -ScaleWidth \ 2, 0
    
    CombineRgn hRgn1, hRgn1, hRgn2, RGN_OR
    
    OffsetRgn hRgn2, 0, -ScaleHeight \ 4
    
    CombineRgn hRgn1, hRgn1, hRgn2, RGN_XOR
    
    OffsetRgn hRgn2, ScaleWidth \ 2, 0
    
    CombineRgn hRgn1, hRgn1, hRgn2, RGN_XOR
    
    SetWindowRgn hWnd, hRgn1, True
    
    DeleteObject hRgn2
    
End Sub