SetWindowShape – Create elliptical or rounded forms

Private Type POINTAPI    X As Long    Y As LongEnd TypePrivate Type RECT    Left As Long    Top As Long    Right As Long    Bottom As LongEnd Type' Region API functinsPrivate Declare Function CreateEllipticRgn Lib "gdi32" (ByVal X1 As Long, _    ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As LongPrivate Declare Function CreatePolygonRgn Lib "gdi32" (lpPoint As POINTAPI, _    ByVal nCount As Long, ByVal nPolyFillMode As Long) As LongPrivate Declare Function CreateRoundRectRgn Lib "gdi32" (ByVal X1 As Long, _    ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long, ByVal X3 As Long, _    ByVal Y3 As Long) As LongPrivate Declare Function GetWindowRect Lib "user32" (ByVal hWnd As Long, _    lpRect As RECT) As LongPrivate Declare Function SetWindowRgn Lib "user32" (ByVal hWnd As Long, _    ByVal hRgn As Long, ByVal bRedraw As Long) As LongPrivate Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As _    Long' modify the shape of a window'' This routine supports three values for SHAPE'    0 = circle/ellipse, 1=rounded rect, 2=rhomb'' NOTES: You get best effects using borderless forms'        Remember to provide alternative commands for'        closing and moving the formSub SetWindowShape(ByVal hWnd As Long, ByVal Shape As Long)    Dim lpRect As RECT    Dim wi As Long, he As Long    Dim hRgn As Long        ' get the bounding rectangle's size    GetWindowRect hWnd, lpRect    wi = lpRect.Right - lpRect.Left    he = lpRect.Bottom - lpRect.Top        ' create a region    Select Case Shape        Case 0          ' circle/ellipse            hRgn = CreateEllipticRgn(0, 0, wi, he)        Case 1          ' rounded rectangle            hRgn = CreateRoundRectRgn(0, 0, wi, he, 20, 20)        Case 2          ' rhomb            Dim lpPoints(3) As POINTAPI            lpPoints(0).X = wi  2            lpPoints(0).Y = 0            lpPoints(1).X = 0            lpPoints(1).Y = he  2            lpPoints(2).X = wi  2            lpPoints(2).Y = he            lpPoints(3).X = wi            lpPoints(3).Y = he  2            hRgn = CreatePolygonRgn(lpPoints(0), 4, 1)    End Select        ' trim the window to the region    SetWindowRgn hWnd, hRgn, True    DeleteObject hRgnEnd Sub

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