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• This code make a transparent area of different shape(such as Rectangle, Circle) so you can not only

This code make a transparent area of different shape(such as Rectangle, Circle) so you can not only

This code make a transparent area of different shape(such as Rectangle, Circle) so you can not only see through it, and acturally access the

Rate This code make a transparent area of different shape(such as Rectangle, Circle) so you can not only

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Private 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 Long
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 CreateEllipticRgn 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

'2  The Forction


Private Function fMakeATranspArea(AreaType As String, pCordinate() As Long) As Boolean

'Name: fMakeATranpArea
'Author: Dalin Nie
'Date:   5/18/98
'Purpose: Create a Transprarent Area in a form so that you can see through
'Input:  Areatype : a String indicate what kind of hole shape it would like to make
'        PCordinate : the cordinate area needed for create the shape:
'         Example: X1,  Y1, X2, Y2 for Rectangle


'OutPut: A boolean

Const RGN_DIFF = 4

Dim lOriginalForm As Long
Dim ltheHole As Long
Dim lNewForm As Long
Dim lFwidth As Single
Dim lFHeight As Single
Dim lborder_width As Single
Dim ltitle_height As Single


 On Error GoTo Trap
    lFwidth = ScaleX(Width, vbTwips, vbPixels)
    lFHeight = ScaleY(Height, vbTwips, vbPixels)
    lOriginalForm = CreateRectRgn(0, 0, lFwidth, lFHeight)
    
    lborder_width = (lFHeight - ScaleWidth) / 2
    ltitle_height = lFHeight - lborder_width - ScaleHeight

Select Case AreaType
  
    Case "Elliptic"
 
            ltheHole = CreateEllipticRgn(pCordinate(1), pCordinate(2), pCordinate(3), pCordinate(4))

    Case "RectAngle"
   
            ltheHole = CreateRectRgn(pCordinate(1), pCordinate(2), pCordinate(3), pCordinate(4))

      
    Case "RoundRect"
             
               ltheHole = CreateRoundRectRgn(pCordinate(1), pCordinate(2), pCordinate(3), pCordinate(4), pCordinate(5), pCordinate(6))

    Case "Circle"
               ltheHole = CreateRoundRectRgn(pCordinate(1), pCordinate(2), pCordinate(3), pCordinate(4), pCordinate(3), pCordinate(4))
    
    Case Else
           MsgBox "Unknown Shape!!"
           Exit Function

       End Select

    lNewForm = CreateRectRgn(0, 0, 0, 0)
    CombineRgn lNewForm, lOriginalForm, _
        ltheHole, RGN_DIFF
    
    SetWindowRgn hWnd, lNewForm, True
    Me.Refresh
    fMakeATranspArea = True
Exit Function

Trap:
     MsgBox "error Occurred. Error # " & Err.Number & ", " & Err.Description


End Function

' 3'To Call
Dim lParam(1 To 6) As Long

lParam(1) = 100
lParam(2) = 100
lParam(3) = 250
lParam(4) = 250
lParam(5) = 50
lParam(6) = 50

'Call fMakeATranspArea("RoundRect", lParam())
'Call fMakeATranspArea("RectAngle", lParam())
Call fMakeATranspArea("Circle", lParam())
'Call fMakeATranspArea("Elliptic", lParam())