Option Explicit
Private Type BITMAP
bmType As Long
bmWidth As Long
bmHeight As Long
bmWidthBytes As Long
bmPlanes As Integer
bmBitsPixel As Integer
bmBits As Long
End TypePrivate Declare Function GetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long
Private Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) 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 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 LongPublic Sub MakeTransparent(frm As Form, pic As PictureBox)
Const RGN_OR = 2Dim border_width As Single
Dim title_height As Single
Dim bm As BITMAP
Dim bytes() As Byte
Dim ints() As Integer
Dim longs() As Long
Dim R As Integer
Dim C As Integer
Dim start_c As Integer
Dim stop_c As Integer
Dim x0 As Long
Dim y0 As Long
Dim combined_rgn As Long
Dim new_rgn As Long
Dim offset As Integer
Dim colourDepth As Integer frm.ScaleMode = vbPixels
pic.ScaleMode = vbPixels
pic.AutoRedraw = True
pic.Picture = pic.Image
' 获取窗体的边框大小
border_width = (frm.ScaleX(frm.Width, vbTwips, vbPixels) - frm.ScaleWidth) / 2
title_height = frm.ScaleX(frm.Height, vbTwips, vbPixels) - border_width - frm.ScaleHeight
' 获取图片大小
x0 = pic.Left + border_width
y0 = pic.Top + title_height
'给出图片信息
GetObject pic.Image, Len(bm), bm
Select Case bm.bmBitsPixel
Case 15, 16:
'MsgBox _
"图片框中图片的颜色大高。",vbExclamation + vbOKOnly
colourDepth = 2
' 分配空格给图片.
ReDim ints(0 To bm.bmWidthBytes \ 2 - 1, 0 To bm.bmHeight - 1)
' 给出图片表面数据
GetBitmapBits pic.Image, bm.bmHeight * bm.bmWidthBytes, ints(0, 0)
' 建立表单区域
For R = 0 To bm.bmHeight - 2
C = 0
Do While C < bm.bmWidth
start_c = 0
stop_c = 0
' 查找白色区域,屏蔽
Do While C < bm.bmWidth
If (ints(C, R) And &H7FFF) <> &H7FFF Then Exit Do
C = C + 1
Loop
start_c = C
Do While C < bm.bmWidth
If (ints(C, R) And &H7FFF) = &H7FFF Then Exit Do
C = C + 1
Loop
stop_c = C
If start_c < bm.bmWidth Then
If stop_c >= bm.bmWidth Then stop_c = bm.bmWidth - 1
new_rgn = CreateRectRgn(start_c + x0, R + y0, stop_c + x0, R + y0 + 1)
If combined_rgn = 0 Then
combined_rgn = new_rgn
Else
CombineRgn combined_rgn, combined_rgn, new_rgn, RGN_OR
DeleteObject new_rgn
End If
End If
Loop
Next R
Case 24:
colourDepth = 3
ReDim bytes(0 To bm.bmWidthBytes - 1, 0 To bm.bmHeight - 1)
GetBitmapBits pic.Image, bm.bmHeight * bm.bmWidthBytes, bytes(0, 0)
For R = 0 To bm.bmHeight - 2
' Create a region for this row.
C = 0
Do While C < bm.bmWidth
start_c = 0
stop_c = 0
offset = C * colourDepth
Do While C < bm.bmWidth
If bytes(offset, R) <> 255 Or _
bytes(offset + 1, R) <> 255 Or _
bytes(offset + 2, R) <> 255 Then Exit Do
C = C + 1
offset = offset + colourDepth
Loop
start_c = C
Do While C < bm.bmWidth
If bytes(offset, R) = 255 And _
bytes(offset + 1, R) = 255 And _
bytes(offset + 2, R) = 255 _
Then Exit Do
C = C + 1
offset = offset + colourDepth
Loop
stop_c = C
If start_c < bm.bmWidth Then
If stop_c >= bm.bmWidth Then stop_c = bm.bmWidth - 1
' 建立区域
new_rgn = CreateRectRgn(start_c + x0, R + y0, stop_c + x0, R + y0 + 1)
If combined_rgn = 0 Then
combined_rgn = new_rgn
Else
CombineRgn combined_rgn, combined_rgn, new_rgn, RGN_OR
DeleteObject new_rgn
End If
End If
Loop
Next R
Case 32:
colourDepth = 4
ReDim longs(0 To bm.bmWidthBytes \ 4 - 1, 0 To bm.bmHeight - 1)
GetBitmapBits pic.Image, bm.bmHeight * bm.bmWidthBytes, longs(0, 0)
For R = 0 To bm.bmHeight - 2
C = 0
Do While C < bm.bmWidth
start_c = 0
stop_c = 0
Do While C < bm.bmWidth
If (longs(C, R) And &HFFFFFF) <> &HFFFFFF Then Exit Do
C = C + 1
Loop
start_c = C
Do While C < bm.bmWidth
If (longs(C, R) And &HFFFFFF) = &HFFFFFF Then Exit Do
C = C + 1
Loop
stop_c = C
If start_c < bm.bmWidth Then
If stop_c >= bm.bmWidth Then stop_c = bm.bmWidth - 1
new_rgn = CreateRectRgn(start_c + x0, R + y0, stop_c + x0, R + y0 + 1)
If combined_rgn = 0 Then
combined_rgn = new_rgn
Else
CombineRgn combined_rgn, combined_rgn, new_rgn, RGN_OR
DeleteObject new_rgn
End If
End If
Loop
Next R
Case Else
MsgBox "对不起,程序必须在 16位, 24-位 或 32-位 颜色下。", _
vbExclamation + vbOKOnly
Exit Sub
End Select
' 设置表单外观为建立区域
SetWindowRgn frm.hWnd, combined_rgn, True
DeleteObject combined_rgn
End Sub
Private Type BITMAP
bmType As Long
bmWidth As Long
bmHeight As Long
bmWidthBytes As Long
bmPlanes As Integer
bmBitsPixel As Integer
bmBits As Long
End TypePrivate Declare Function GetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long
Private Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) 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 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 LongPublic Sub MakeTransparent(frm As Form, pic As PictureBox)
Const RGN_OR = 2Dim border_width As Single
Dim title_height As Single
Dim bm As BITMAP
Dim bytes() As Byte
Dim ints() As Integer
Dim longs() As Long
Dim R As Integer
Dim C As Integer
Dim start_c As Integer
Dim stop_c As Integer
Dim x0 As Long
Dim y0 As Long
Dim combined_rgn As Long
Dim new_rgn As Long
Dim offset As Integer
Dim colourDepth As Integer frm.ScaleMode = vbPixels
pic.ScaleMode = vbPixels
pic.AutoRedraw = True
pic.Picture = pic.Image
' 获取窗体的边框大小
border_width = (frm.ScaleX(frm.Width, vbTwips, vbPixels) - frm.ScaleWidth) / 2
title_height = frm.ScaleX(frm.Height, vbTwips, vbPixels) - border_width - frm.ScaleHeight
' 获取图片大小
x0 = pic.Left + border_width
y0 = pic.Top + title_height
'给出图片信息
GetObject pic.Image, Len(bm), bm
Select Case bm.bmBitsPixel
Case 15, 16:
'MsgBox _
"图片框中图片的颜色大高。",vbExclamation + vbOKOnly
colourDepth = 2
' 分配空格给图片.
ReDim ints(0 To bm.bmWidthBytes \ 2 - 1, 0 To bm.bmHeight - 1)
' 给出图片表面数据
GetBitmapBits pic.Image, bm.bmHeight * bm.bmWidthBytes, ints(0, 0)
' 建立表单区域
For R = 0 To bm.bmHeight - 2
C = 0
Do While C < bm.bmWidth
start_c = 0
stop_c = 0
' 查找白色区域,屏蔽
Do While C < bm.bmWidth
If (ints(C, R) And &H7FFF) <> &H7FFF Then Exit Do
C = C + 1
Loop
start_c = C
Do While C < bm.bmWidth
If (ints(C, R) And &H7FFF) = &H7FFF Then Exit Do
C = C + 1
Loop
stop_c = C
If start_c < bm.bmWidth Then
If stop_c >= bm.bmWidth Then stop_c = bm.bmWidth - 1
new_rgn = CreateRectRgn(start_c + x0, R + y0, stop_c + x0, R + y0 + 1)
If combined_rgn = 0 Then
combined_rgn = new_rgn
Else
CombineRgn combined_rgn, combined_rgn, new_rgn, RGN_OR
DeleteObject new_rgn
End If
End If
Loop
Next R
Case 24:
colourDepth = 3
ReDim bytes(0 To bm.bmWidthBytes - 1, 0 To bm.bmHeight - 1)
GetBitmapBits pic.Image, bm.bmHeight * bm.bmWidthBytes, bytes(0, 0)
For R = 0 To bm.bmHeight - 2
' Create a region for this row.
C = 0
Do While C < bm.bmWidth
start_c = 0
stop_c = 0
offset = C * colourDepth
Do While C < bm.bmWidth
If bytes(offset, R) <> 255 Or _
bytes(offset + 1, R) <> 255 Or _
bytes(offset + 2, R) <> 255 Then Exit Do
C = C + 1
offset = offset + colourDepth
Loop
start_c = C
Do While C < bm.bmWidth
If bytes(offset, R) = 255 And _
bytes(offset + 1, R) = 255 And _
bytes(offset + 2, R) = 255 _
Then Exit Do
C = C + 1
offset = offset + colourDepth
Loop
stop_c = C
If start_c < bm.bmWidth Then
If stop_c >= bm.bmWidth Then stop_c = bm.bmWidth - 1
' 建立区域
new_rgn = CreateRectRgn(start_c + x0, R + y0, stop_c + x0, R + y0 + 1)
If combined_rgn = 0 Then
combined_rgn = new_rgn
Else
CombineRgn combined_rgn, combined_rgn, new_rgn, RGN_OR
DeleteObject new_rgn
End If
End If
Loop
Next R
Case 32:
colourDepth = 4
ReDim longs(0 To bm.bmWidthBytes \ 4 - 1, 0 To bm.bmHeight - 1)
GetBitmapBits pic.Image, bm.bmHeight * bm.bmWidthBytes, longs(0, 0)
For R = 0 To bm.bmHeight - 2
C = 0
Do While C < bm.bmWidth
start_c = 0
stop_c = 0
Do While C < bm.bmWidth
If (longs(C, R) And &HFFFFFF) <> &HFFFFFF Then Exit Do
C = C + 1
Loop
start_c = C
Do While C < bm.bmWidth
If (longs(C, R) And &HFFFFFF) = &HFFFFFF Then Exit Do
C = C + 1
Loop
stop_c = C
If start_c < bm.bmWidth Then
If stop_c >= bm.bmWidth Then stop_c = bm.bmWidth - 1
new_rgn = CreateRectRgn(start_c + x0, R + y0, stop_c + x0, R + y0 + 1)
If combined_rgn = 0 Then
combined_rgn = new_rgn
Else
CombineRgn combined_rgn, combined_rgn, new_rgn, RGN_OR
DeleteObject new_rgn
End If
End If
Loop
Next R
Case Else
MsgBox "对不起,程序必须在 16位, 24-位 或 32-位 颜色下。", _
vbExclamation + vbOKOnly
Exit Sub
End Select
' 设置表单外观为建立区域
SetWindowRgn frm.hWnd, combined_rgn, True
DeleteObject combined_rgn
End Sub
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货