Here's How to Make a Form With a HOLE in it.

Want a form that you can move around and see what is behind the center of it? Not sure what good it is, but it's kinda cool. Maybe you can find a good use for it. Noting to add to a project---only the form that you see when you start a new poject.

Code:

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Option Explicit
Private Declare Function CreateRectRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long
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 DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Sub Form_Resize()
Const RGN_DIFF = 4
Dim outer_rgn As Long
Dim inner_rgn As Long
Dim combined_rgn As Long
Dim wid As Single
Dim hgt As Single
Dim border_width As Single
Dim title_height As Single
    If WindowState = vbMinimized Then Exit Sub
   
    ' Create the regions.
    wid = ScaleX(Width, vbTwips, vbPixels)
    hgt = ScaleY(Height, vbTwips, vbPixels)
    outer_rgn = CreateRectRgn(0, 0, wid, hgt)
   
    border_width = (wid - ScaleWidth) / 2
    title_height = hgt - border_width - ScaleHeight
    inner_rgn = CreateRectRgn( _
        wid * 0.25, hgt * 0.25, _
        wid * 0.75, hgt * 0.75)
    ' Subtract the inner region from the outer.
    combined_rgn = CreateRectRgn(0, 0, 0, 0)
    CombineRgn combined_rgn, outer_rgn, _
        inner_rgn, RGN_DIFF
   
    ' Restrict the window to the region.
    SetWindowRgn hWnd, combined_rgn, True
    DeleteObject combined_rgn
    DeleteObject inner_rgn
    DeleteObject outer_rgn
End Sub

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