www.pudn.com > Family.zip > Transparent.bas
Attribute VB_Name = "Transparent"
Option Explicit
'Create different types of regions declares
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 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 CreatePolygonRgn Lib "gdi32" (lpPoint As POINTAPI, ByVal nCount As Long, ByVal nPolyFillMode As Long) As Long
'POINTAPI type required for CreatePolygonRgn
Private Type POINTAPI
X As Long
Y As Long
End Type
'Sets the region
Private Declare Function SetWindowRgn Lib "user32" (ByVal hwnd As Long, ByVal hRgn As Long, ByVal bRedraw As Boolean) As Long
'Combines the region
Private Declare Function CombineRgn Lib "gdi32" (ByVal hDestRgn As Long, ByVal hSrcRgn1 As Long, ByVal hSrcRgn2 As Long, ByVal nCombineMode As Long) As Long
'Type of combine
Const RGN_XOR = 3
Public Sub MakeTransparent(TransForm As Form)
Dim ErrorTest As Double
'In case there's an error, ignore it
On Error Resume Next
Dim Regn As Long
Dim TmpRegn As Long
Dim TmpControl As Control
Dim LinePoints(4) As POINTAPI
'Since the apis work with pixels, change the scalemode
'To pixels
TransForm.ScaleMode = 3
'You have to have a borderless form, this just makes
'sure it's borderless
If TransForm.BorderStyle <> 0 Then MsgBox "Change the borderstyle to 0!", vbCritical, "ACK!": End
'makes everything invisible
Regn = CreateRectRgn(0, 0, 0, 0)
'A loop to check every control in the form
For Each TmpControl In TransForm
'If the control is a line...
If TypeOf TmpControl Is Line Then
'Checks the slope
If Abs((TmpControl.Y1 - TmpControl.Y2) / (TmpControl.X1 - TmpControl.X2)) > 1 Then
'If it's more verticle than horizontal then
'Set the points
LinePoints(0).X = TmpControl.X1 - 1
LinePoints(0).Y = TmpControl.Y1
LinePoints(1).X = TmpControl.X2 - 1
LinePoints(1).Y = TmpControl.Y2
LinePoints(2).X = TmpControl.X2 + 1
LinePoints(2).Y = TmpControl.Y2
LinePoints(3).X = TmpControl.X1 + 1
LinePoints(3).Y = TmpControl.Y1
Else
'If it's more horizontal than verticle then
'Set the points
LinePoints(0).X = TmpControl.X1
LinePoints(0).Y = TmpControl.Y1 - 1
LinePoints(1).X = TmpControl.X2
LinePoints(1).Y = TmpControl.Y2 - 1
LinePoints(2).X = TmpControl.X2
LinePoints(2).Y = TmpControl.Y2 + 1
LinePoints(3).X = TmpControl.X1
LinePoints(3).Y = TmpControl.Y1 + 1
End If
'Creates the new polygon with the points
TmpRegn = CreatePolygonRgn(LinePoints(0), 4, 1)
'If the control is a shape...
ElseIf TypeOf TmpControl Is Shape Then
'An if that checks the type
If TmpControl.Shape = 0 Then
'It's a rectangle
TmpRegn = CreateRectRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width, TmpControl.Top + TmpControl.Height)
ElseIf TmpControl.Shape = 1 Then
'It's a square
If TmpControl.Width < TmpControl.Height Then
TmpRegn = CreateRectRgn(TmpControl.Left, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2, TmpControl.Left + TmpControl.Width, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width)
Else
TmpRegn = CreateRectRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2, TmpControl.Top, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height, TmpControl.Top + TmpControl.Height)
End If
ElseIf TmpControl.Shape = 2 Then
'It's an oval
TmpRegn = CreateEllipticRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width + 0.5, TmpControl.Top + TmpControl.Height + 0.5)
ElseIf TmpControl.Shape = 3 Then
'It's a circle
If TmpControl.Width < TmpControl.Height Then
TmpRegn = CreateEllipticRgn(TmpControl.Left, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2, TmpControl.Left + TmpControl.Width + 0.5, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width + 0.5)
Else
TmpRegn = CreateEllipticRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2, TmpControl.Top, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height + 0.5, TmpControl.Top + TmpControl.Height + 0.5)
End If
ElseIf TmpControl.Shape = 4 Then
'It's a rounded rectangle
If TmpControl.Width > TmpControl.Height Then
TmpRegn = CreateRoundRectRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width + 1, TmpControl.Top + TmpControl.Height + 1, TmpControl.Height / 4, TmpControl.Height / 4)
Else
TmpRegn = CreateRoundRectRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width + 1, TmpControl.Top + TmpControl.Height + 1, TmpControl.Width / 4, TmpControl.Width / 4)
End If
ElseIf TmpControl.Shape = 5 Then
'It's a rounded square
If TmpControl.Width > TmpControl.Height Then
TmpRegn = CreateRoundRectRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2, TmpControl.Top, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height + 1, TmpControl.Top + TmpControl.Height + 1, TmpControl.Height / 4, TmpControl.Height / 4)
Else
TmpRegn = CreateRoundRectRgn(TmpControl.Left, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2, TmpControl.Left + TmpControl.Width + 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width + 1, TmpControl.Width / 4, TmpControl.Width / 4)
End If
End If
'If the control is a shape with a transparent background
If TmpControl.BackStyle = 0 Then
'Combines the regions in memory and makes a new one
CombineRgn Regn, Regn, TmpRegn, RGN_XOR
If TmpControl.Shape = 0 Then
'Rectangle
TmpRegn = CreateRectRgn(TmpControl.Left + 1, TmpControl.Top + 1, TmpControl.Left + TmpControl.Width - 1, TmpControl.Top + TmpControl.Height - 1)
ElseIf TmpControl.Shape = 1 Then
'Square
If TmpControl.Width < TmpControl.Height Then
TmpRegn = CreateRectRgn(TmpControl.Left + 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + 1, TmpControl.Left + TmpControl.Width - 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width - 1)
Else
TmpRegn = CreateRectRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + 1, TmpControl.Top + 1, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height - 1, TmpControl.Top + TmpControl.Height - 1)
End If
ElseIf TmpControl.Shape = 2 Then
'Oval
TmpRegn = CreateEllipticRgn(TmpControl.Left + 1, TmpControl.Top + 1, TmpControl.Left + TmpControl.Width - 0.5, TmpControl.Top + TmpControl.Height - 0.5)
ElseIf TmpControl.Shape = 3 Then
'Circle
If TmpControl.Width < TmpControl.Height Then
TmpRegn = CreateEllipticRgn(TmpControl.Left + 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + 1, TmpControl.Left + TmpControl.Width - 0.5, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width - 0.5)
Else
TmpRegn = CreateEllipticRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + 1, TmpControl.Top + 1, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height - 0.5, TmpControl.Top + TmpControl.Height - 0.5)
End If
ElseIf TmpControl.Shape = 4 Then
'Rounded rectangle
If TmpControl.Width > TmpControl.Height Then
TmpRegn = CreateRoundRectRgn(TmpControl.Left + 1, TmpControl.Top + 1, TmpControl.Left + TmpControl.Width, TmpControl.Top + TmpControl.Height, TmpControl.Height / 4, TmpControl.Height / 4)
Else
TmpRegn = CreateRoundRectRgn(TmpControl.Left + 1, TmpControl.Top + 1, TmpControl.Left + TmpControl.Width, TmpControl.Top + TmpControl.Height, TmpControl.Width / 4, TmpControl.Width / 4)
End If
ElseIf TmpControl.Shape = 5 Then
'Rounded square
If TmpControl.Width > TmpControl.Height Then
TmpRegn = CreateRoundRectRgn(TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + 1, TmpControl.Top + 1, TmpControl.Left + (TmpControl.Width - TmpControl.Height) / 2 + TmpControl.Height, TmpControl.Top + TmpControl.Height, TmpControl.Height / 4, TmpControl.Height / 4)
Else
TmpRegn = CreateRoundRectRgn(TmpControl.Left + 1, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + 1, TmpControl.Left + TmpControl.Width, TmpControl.Top + (TmpControl.Height - TmpControl.Width) / 2 + TmpControl.Width, TmpControl.Width / 4, TmpControl.Width / 4)
End If
End If
End If
Else
'Create a rectangular region with its parameters
TmpRegn = CreateRectRgn(TmpControl.Left, TmpControl.Top, TmpControl.Left + TmpControl.Width, TmpControl.Top + TmpControl.Height)
End If
'Checks to make sure that the control has a width
'or else you'll get some weird results
ErrorTest = 0
ErrorTest = TmpControl.Width
If ErrorTest <> 0 Or TypeOf TmpControl Is Line Then
'Combines the regions
CombineRgn Regn, Regn, TmpRegn, RGN_XOR
End If
Next TmpControl
'Make the regions
SetWindowRgn TransForm.hwnd, Regn, True
End Sub