可以将 icon、Cursor、bitmap对象或者PictureBox内的图象编辑结果转换为VB的picture对象'功能 Picture对象相关操作
'类别 模块 Option Explicit'*****************************************************************
'* 将 icon 对象转换为 VB 的 picture 对象
'* 参数∶ hIcon 一个有效的图标句柄
'*****************************************************************
Function IconToPicture(ByVal hIcon As Long) As IPicture
Dim ipic As IPicture
Dim picdes As PICTDESC, iidIPicture As IID If hIcon = hNull Then Exit Function
picdes.cbSizeofstruct = Len(picdes)
picdes.picType = vbPicTypeIcon
picdes.hgdiobj = hIcon
' Fill in magic IPicture GUID {7BF80980-BF32-101A-8BBB-00AA00300CAB}
iidIPicture.Data1 = &H7BF80980
iidIPicture.Data2 = &HBF32
iidIPicture.Data3 = &H101A
iidIPicture.Data4(0) = &H8B
iidIPicture.Data4(1) = &HBB
iidIPicture.Data4(2) = &H0
iidIPicture.Data4(3) = &HAA
iidIPicture.Data4(4) = &H0
iidIPicture.Data4(5) = &H30
iidIPicture.Data4(6) = &HC
iidIPicture.Data4(7) = &HAB
OleCreatePictureIndirect picdes, iidIPicture, True, ipic
Set IconToPicture = ipic
End Function'******************************************************************
'* 将 Cursor 对象转换为 VB 的 Picture 对象
'* 参数∶ hIcon 一个有效的光标句柄
'******************************************************************
Function CursorToPicture(ByVal hIcon As Long) As IPicture
' It's just an alias
Set CursorToPicture = IconToPicture(hIcon)
End Function'******************************************************************
'* 将 bitmap 对象转换为 VB 的 picture 对象
'* 参数∶ hBmp 一个有效的位图句柄
'* hpal 一个有效的调色板句柄
'******************************************************************
Function BitmapToPicture(ByVal hBmp As Long, _
Optional ByVal hPal As Long = hNull) As IPicture
Dim ipic As IPicture
Dim picdes As PICTDESC, iidIPicture As IID
picdes.cbSizeofstruct = Len(picdes)
picdes.picType = vbPicTypeBitmap
picdes.hgdiobj = hBmp
picdes.hPalOrXYExt = hPal
' Fill in magic IPicture GUID {7BF80980-BF32-101A-8BBB-00AA00300CAB}
iidIPicture.Data1 = &H7BF80980
iidIPicture.Data2 = &HBF32
iidIPicture.Data3 = &H101A
iidIPicture.Data4(0) = &H8B
iidIPicture.Data4(1) = &HBB
iidIPicture.Data4(2) = &H0
iidIPicture.Data4(3) = &HAA
iidIPicture.Data4(4) = &H0
iidIPicture.Data4(5) = &H30
iidIPicture.Data4(6) = &HC
iidIPicture.Data4(7) = &HAB OleCreatePictureIndirect picdes, iidIPicture, True, ipic
Set BitmapToPicture = ipic
End Function'**********************************************************************
'* 刷新 PictureBox 控件的 Picture 对象。对PictureBox中的任何绘图操作,
'* 通过它即可转换为Picture对象
'* 使用该函数可将PictureBox内的图象编辑结果永久更新为 Picture 对象
'* 参数∶ PicBox PictureBox控件名
'* lWidth 需要更新的图象宽度(按你的需要,不局限于目前Picture对
'* 象的实际大小),也是最后要形成的Picture对象的图象宽度(单位∶像素)
'* lHeight 需要更新的图象高度,其他类同与 lWidth(单位∶像素)
'**********************************************************************
Function UpdatePicture(ByRef PicBox As Object, Optional ByVal lWidth As Long = -1, _
Optional ByVal lHeight As Long = -1) As Boolean
On Error GoTo errHandle Dim oldScMode As Integer
Dim hNewDC As Long
Dim hOldBit As Long
Dim hNewBit As Long oldScMode = -1
oldScMode = PicBox.ScaleMode
If lWidth = -1 Then
lWidth = PicBox.ScaleX(PicBox.Picture.Width, 8, vbPixels)
End If
If lHeight = -1 Then
lHeight = PicBox.ScaleY(PicBox.Picture.Height, 8, vbPixels)
End If hNewDC = CreateCompatibleDC(PicBox.hdc)
hNewBit = CreateCompatibleBitmap(PicBox.hdc, lWidth, lHeight)
hOldBit = SelectObject(hNewDC, hNewBit) BitBlt hNewDC, 0, 0, lWidth, lHeight, PicBox.hdc, 0, 0, vbSrcCopy
SelectObject hNewDC, hOldBit PicBox.Picture = BitmapToPicture(hNewBit) DeleteObject hNewDC
DeleteDC hNewDC
If oldScMode <> -1 Then PicBox.ScaleMode = oldScMode
UpdatePicture = True Exit Function
errHandle:
UpdatePicture = False
If oldScMode <> -1 Then PicBox.ScaleMode = oldScMode
End Function
有关的API函数声明Option ExplicitPublic Const hNull = 0Public Type IID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(0 To 7) As Byte
End TypePublic Type PICTDESC
cbSizeofstruct As Long
picType As Long
hgdiobj As Long
hPalOrXYExt As Long
End TypePublic Declare Sub OleCreatePictureIndirect Lib "olepro32.dll" ( _
lpPictDesc As PICTDESC, _
riid As IID, _
ByVal fPictureOwnsHandle As Long, _
ipic As IPicture)
Public Declare Function CreateCompatibleDC& Lib "gdi32" (ByVal hdc As Long)
Public Declare Function CreateCompatibleBitmap& Lib "gdi32" ( _
ByVal hdc As Long, _
ByVal nWidth As Long, _
ByVal nHeight As Long)
Public Declare Function DeleteDC& Lib "gdi32" (ByVal hdc As Long)
Public Declare Function SelectObject& Lib "gdi32" ( _
ByVal hdc As Long, _
ByVal hObject As Long)
Public Declare Function DeleteObject& Lib "gdi32" (ByVal hObject As Long)
'类别 模块 Option Explicit'*****************************************************************
'* 将 icon 对象转换为 VB 的 picture 对象
'* 参数∶ hIcon 一个有效的图标句柄
'*****************************************************************
Function IconToPicture(ByVal hIcon As Long) As IPicture
Dim ipic As IPicture
Dim picdes As PICTDESC, iidIPicture As IID If hIcon = hNull Then Exit Function
picdes.cbSizeofstruct = Len(picdes)
picdes.picType = vbPicTypeIcon
picdes.hgdiobj = hIcon
' Fill in magic IPicture GUID {7BF80980-BF32-101A-8BBB-00AA00300CAB}
iidIPicture.Data1 = &H7BF80980
iidIPicture.Data2 = &HBF32
iidIPicture.Data3 = &H101A
iidIPicture.Data4(0) = &H8B
iidIPicture.Data4(1) = &HBB
iidIPicture.Data4(2) = &H0
iidIPicture.Data4(3) = &HAA
iidIPicture.Data4(4) = &H0
iidIPicture.Data4(5) = &H30
iidIPicture.Data4(6) = &HC
iidIPicture.Data4(7) = &HAB
OleCreatePictureIndirect picdes, iidIPicture, True, ipic
Set IconToPicture = ipic
End Function'******************************************************************
'* 将 Cursor 对象转换为 VB 的 Picture 对象
'* 参数∶ hIcon 一个有效的光标句柄
'******************************************************************
Function CursorToPicture(ByVal hIcon As Long) As IPicture
' It's just an alias
Set CursorToPicture = IconToPicture(hIcon)
End Function'******************************************************************
'* 将 bitmap 对象转换为 VB 的 picture 对象
'* 参数∶ hBmp 一个有效的位图句柄
'* hpal 一个有效的调色板句柄
'******************************************************************
Function BitmapToPicture(ByVal hBmp As Long, _
Optional ByVal hPal As Long = hNull) As IPicture
Dim ipic As IPicture
Dim picdes As PICTDESC, iidIPicture As IID
picdes.cbSizeofstruct = Len(picdes)
picdes.picType = vbPicTypeBitmap
picdes.hgdiobj = hBmp
picdes.hPalOrXYExt = hPal
' Fill in magic IPicture GUID {7BF80980-BF32-101A-8BBB-00AA00300CAB}
iidIPicture.Data1 = &H7BF80980
iidIPicture.Data2 = &HBF32
iidIPicture.Data3 = &H101A
iidIPicture.Data4(0) = &H8B
iidIPicture.Data4(1) = &HBB
iidIPicture.Data4(2) = &H0
iidIPicture.Data4(3) = &HAA
iidIPicture.Data4(4) = &H0
iidIPicture.Data4(5) = &H30
iidIPicture.Data4(6) = &HC
iidIPicture.Data4(7) = &HAB OleCreatePictureIndirect picdes, iidIPicture, True, ipic
Set BitmapToPicture = ipic
End Function'**********************************************************************
'* 刷新 PictureBox 控件的 Picture 对象。对PictureBox中的任何绘图操作,
'* 通过它即可转换为Picture对象
'* 使用该函数可将PictureBox内的图象编辑结果永久更新为 Picture 对象
'* 参数∶ PicBox PictureBox控件名
'* lWidth 需要更新的图象宽度(按你的需要,不局限于目前Picture对
'* 象的实际大小),也是最后要形成的Picture对象的图象宽度(单位∶像素)
'* lHeight 需要更新的图象高度,其他类同与 lWidth(单位∶像素)
'**********************************************************************
Function UpdatePicture(ByRef PicBox As Object, Optional ByVal lWidth As Long = -1, _
Optional ByVal lHeight As Long = -1) As Boolean
On Error GoTo errHandle Dim oldScMode As Integer
Dim hNewDC As Long
Dim hOldBit As Long
Dim hNewBit As Long oldScMode = -1
oldScMode = PicBox.ScaleMode
If lWidth = -1 Then
lWidth = PicBox.ScaleX(PicBox.Picture.Width, 8, vbPixels)
End If
If lHeight = -1 Then
lHeight = PicBox.ScaleY(PicBox.Picture.Height, 8, vbPixels)
End If hNewDC = CreateCompatibleDC(PicBox.hdc)
hNewBit = CreateCompatibleBitmap(PicBox.hdc, lWidth, lHeight)
hOldBit = SelectObject(hNewDC, hNewBit) BitBlt hNewDC, 0, 0, lWidth, lHeight, PicBox.hdc, 0, 0, vbSrcCopy
SelectObject hNewDC, hOldBit PicBox.Picture = BitmapToPicture(hNewBit) DeleteObject hNewDC
DeleteDC hNewDC
If oldScMode <> -1 Then PicBox.ScaleMode = oldScMode
UpdatePicture = True Exit Function
errHandle:
UpdatePicture = False
If oldScMode <> -1 Then PicBox.ScaleMode = oldScMode
End Function
有关的API函数声明Option ExplicitPublic Const hNull = 0Public Type IID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(0 To 7) As Byte
End TypePublic Type PICTDESC
cbSizeofstruct As Long
picType As Long
hgdiobj As Long
hPalOrXYExt As Long
End TypePublic Declare Sub OleCreatePictureIndirect Lib "olepro32.dll" ( _
lpPictDesc As PICTDESC, _
riid As IID, _
ByVal fPictureOwnsHandle As Long, _
ipic As IPicture)
Public Declare Function CreateCompatibleDC& Lib "gdi32" (ByVal hdc As Long)
Public Declare Function CreateCompatibleBitmap& Lib "gdi32" ( _
ByVal hdc As Long, _
ByVal nWidth As Long, _
ByVal nHeight As Long)
Public Declare Function DeleteDC& Lib "gdi32" (ByVal hdc As Long)
Public Declare Function SelectObject& Lib "gdi32" ( _
ByVal hdc As Long, _
ByVal hObject As Long)
Public Declare Function DeleteObject& Lib "gdi32" (ByVal hObject As Long)
Public Type TypeIcon
cbSize As Long
picType As PictureTypeConstants
hIcon As Long
End Type
Public Type CLSID
id(16) As Byte
End TypePublic Function IconToPicture(hIcon As Long) As IPictureDisp
Dim cls_id As CLSID
Dim hRes As Long
Dim new_icon As TypeIcon
Dim lpUnk As IUnknown
With new_icon
.cbSize = Len(new_icon)
.picType = vbPicTypeIcon
.hIcon = hIcon
End With
With cls_id
.id(8) = &HC0
.id(15) = &H46
End With
hRes = OleCreatePictureIndirect(new_icon, cls_id, 1, lpUnk)
If hRes = 0 Then Set IconToPicture = lpUnk
End Function