我用这个程序截取的图片用commondialog控件保存时图片大小大于1M,
谁能帮我解决下让图片保存后在100k左右MOdule1.bas文件中的代码如下:Option Explicit
Option Base 0Public Type PALETTEENTRY
peRed As Byte
peGreen As Byte
peBlue As Byte
peFlags As Byte
End TypePublic Type LOGPALETTE
palVersion As Integer
palNumEntries As Integer
palPalEntry(255) As PALETTEENTRY
End TypePublic Type GUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(7) As Byte
End TypePublic Const RASTERCAPS As Long = 38
Public Const RC_PALETTE As Long = &H100
Public Const SIZEPALETTE As Long = 104Public Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End TypePublic Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Long, _
ByVal nWidth As Long, ByVal nHeight As Long) As Long
Public Declare Function GetDeviceCaps Lib "GDI32" (ByVal hDC As Long, ByVal _
iCapabilitiy As Long) As Long
Public Declare Function GetSystemPaletteEntries Lib "GDI32" (ByVal hDC As Long, _
ByVal wStartIndex As Long, ByVal wNumEntries As Long, lpPaletteEntries _
As PALETTEENTRY) As Long
Public Declare Function CreatePalette Lib "GDI32" (lpLogPalette As LOGPALETTE) _
As Long
Public Declare Function SelectObject Lib "GDI32" (ByVal hDC As Long, ByVal hObject _
As Long) As Long
Public Declare Function BitBlt Lib "GDI32" (ByVal hDCDest As Long, ByVal XDest As _
Long, ByVal YDest As Long, ByVal nWidth As Long, ByVal nHeight As Long, _
ByVal hDCSrc As Long, ByVal XSrc As Long, ByVal YSrc As Long, ByVal dwRop _
As Long) As Long
Public Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetForegroundWindow Lib "USER32" () As Long
Public Declare Function SelectPalette Lib "GDI32" (ByVal hDC As Long, ByVal hPalette _
As Long, ByVal bForceBackground As Long) As Long
Public Declare Function RealizePalette Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetWindowDC Lib "USER32" (ByVal hWnd As Long) As Long
Public Declare Function GetDC Lib "USER32" (ByVal hWnd As Long) As Long
Public Declare Function GetWindowRect Lib "USER32" (ByVal hWnd As Long, lpRect As _
RECT) As Long
Public Declare Function ReleaseDC Lib "USER32" (ByVal hWnd As Long, ByVal hDC As _
Long) As Long
Public Declare Function GetDesktopWindow Lib "USER32" () As LongPublic Type PicBmp
Size As Long
Type As Long
hBmp As Long
hPal As Long
Reserved As Long
End Type
Public Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As _
PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long
Public Function CaptureWindow(ByVal hWndSrc As Long, ByVal Client As Boolean, ByVal _
LeftSrc As Long, ByVal TopSrc As Long, ByVal WidthSrc As Long, ByVal HeightSrc _
As Long) As Picture Dim hDCMemory As Long
Dim hBmp As Long
Dim hBmpPrev As Long
Dim r As Long
Dim hDCSrc As Long
Dim hPal As Long
Dim hPalPrev As Long
Dim RasterCapsScrn As Long
Dim HasPaletteScrn As Long
Dim PaletteSizeScrn As Long
Dim LogPal As LOGPALETTE If Client Then
hDCSrc = GetDC(hWndSrc)
Else
hDCSrc = GetWindowDC(hWndSrc)
End If hDCMemory = CreateCompatibleDC(hDCSrc)
hBmp = CreateCompatibleBitmap(hDCSrc, WidthSrc, HeightSrc)
hBmpPrev = SelectObject(hDCMemory, hBmp) '获得屏幕属性
RasterCapsScrn = GetDeviceCaps(hDCSrc, RASTERCAPS)
HasPaletteScrn = RasterCapsScrn And RC_PALETTE
PaletteSizeScrn = GetDeviceCaps(hDCSrc, SIZEPALETTE) '如果屏幕对象有调色板则获得屏幕调色板
If HasPaletteScrn And (PaletteSizeScrn = 256) Then
'建立屏幕调色板的拷贝
LogPal.palVersion = &H300
LogPal.palNumEntries = 256
r = GetSystemPaletteEntries(hDCSrc, 0, 256, LogPal.palPalEntry(0))
hPal = CreatePalette(LogPal)
'将新建立的调色板选如建立的内存绘图句柄中
hPalPrev = SelectPalette(hDCMemory, hPal, 0)
r = RealizePalette(hDCMemory)
End If '拷贝图象
r = BitBlt(hDCMemory, 0, 0, WidthSrc, HeightSrc, hDCSrc, LeftSrc, TopSrc, vbSrcCopy) hBmp = SelectObject(hDCMemory, hBmpPrev) If HasPaletteScrn And (PaletteSizeScrn = 256) Then
hPal = SelectPalette(hDCMemory, hPalPrev, 0)
End If '释放资源
r = DeleteDC(hDCMemory)
r = ReleaseDC(hWndSrc, hDCSrc) Set CaptureWindow = CreateBitmapPicture(hBmp, hPal)
End FunctionPublic Function CreateBitmapPicture(ByVal hBmp As Long, ByVal hPal As Long) As Picture
Dim r As Long Dim Pic As PicBmp
Dim IPic As IPicture
Dim IID_IDispatch As GUID '填充IDispatch界面
With IID_IDispatch
.Data1 = &H20400
.Data4(0) = &HC0
.Data4(7) = &H46
End With '填充Pic
With Pic
.Size = Len(Pic) ' Pic结构长度
.Type = vbPicTypeBitmap ' 图象类型
.hBmp = hBmp ' 位图句柄
.hPal = hPal ' 调色板句柄
End With '建立Picture图象
r = OleCreatePictureIndirect(Pic, IID_IDispatch, 1, IPic) '返回Picture对象
Set CreateBitmapPicture = IPic
End Functionfrom1.frm中的代码如下:Private Sub Command1_Click()
picName = Year(Now()) & Right("0" + CStr(Month(Now())), 2) & Right("0" + CStr(Day(Now())), 2) & Right("0" + CStr(Hour(Now())), 2) & Right("0" + CStr(Minute(Now())), 2) & Right("0" + CStr(Second(Now())), 2)
picName = App.Path & "\" & picName & ".jpg"
Set Picture1.Picture = CaptureActiveWindow()
SavePicture Picture1.Picture, picName
Me.SetFocus
end sub
谁能帮我解决下让图片保存后在100k左右MOdule1.bas文件中的代码如下:Option Explicit
Option Base 0Public Type PALETTEENTRY
peRed As Byte
peGreen As Byte
peBlue As Byte
peFlags As Byte
End TypePublic Type LOGPALETTE
palVersion As Integer
palNumEntries As Integer
palPalEntry(255) As PALETTEENTRY
End TypePublic Type GUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(7) As Byte
End TypePublic Const RASTERCAPS As Long = 38
Public Const RC_PALETTE As Long = &H100
Public Const SIZEPALETTE As Long = 104Public Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End TypePublic Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Long, _
ByVal nWidth As Long, ByVal nHeight As Long) As Long
Public Declare Function GetDeviceCaps Lib "GDI32" (ByVal hDC As Long, ByVal _
iCapabilitiy As Long) As Long
Public Declare Function GetSystemPaletteEntries Lib "GDI32" (ByVal hDC As Long, _
ByVal wStartIndex As Long, ByVal wNumEntries As Long, lpPaletteEntries _
As PALETTEENTRY) As Long
Public Declare Function CreatePalette Lib "GDI32" (lpLogPalette As LOGPALETTE) _
As Long
Public Declare Function SelectObject Lib "GDI32" (ByVal hDC As Long, ByVal hObject _
As Long) As Long
Public Declare Function BitBlt Lib "GDI32" (ByVal hDCDest As Long, ByVal XDest As _
Long, ByVal YDest As Long, ByVal nWidth As Long, ByVal nHeight As Long, _
ByVal hDCSrc As Long, ByVal XSrc As Long, ByVal YSrc As Long, ByVal dwRop _
As Long) As Long
Public Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetForegroundWindow Lib "USER32" () As Long
Public Declare Function SelectPalette Lib "GDI32" (ByVal hDC As Long, ByVal hPalette _
As Long, ByVal bForceBackground As Long) As Long
Public Declare Function RealizePalette Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetWindowDC Lib "USER32" (ByVal hWnd As Long) As Long
Public Declare Function GetDC Lib "USER32" (ByVal hWnd As Long) As Long
Public Declare Function GetWindowRect Lib "USER32" (ByVal hWnd As Long, lpRect As _
RECT) As Long
Public Declare Function ReleaseDC Lib "USER32" (ByVal hWnd As Long, ByVal hDC As _
Long) As Long
Public Declare Function GetDesktopWindow Lib "USER32" () As LongPublic Type PicBmp
Size As Long
Type As Long
hBmp As Long
hPal As Long
Reserved As Long
End Type
Public Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As _
PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long
Public Function CaptureWindow(ByVal hWndSrc As Long, ByVal Client As Boolean, ByVal _
LeftSrc As Long, ByVal TopSrc As Long, ByVal WidthSrc As Long, ByVal HeightSrc _
As Long) As Picture Dim hDCMemory As Long
Dim hBmp As Long
Dim hBmpPrev As Long
Dim r As Long
Dim hDCSrc As Long
Dim hPal As Long
Dim hPalPrev As Long
Dim RasterCapsScrn As Long
Dim HasPaletteScrn As Long
Dim PaletteSizeScrn As Long
Dim LogPal As LOGPALETTE If Client Then
hDCSrc = GetDC(hWndSrc)
Else
hDCSrc = GetWindowDC(hWndSrc)
End If hDCMemory = CreateCompatibleDC(hDCSrc)
hBmp = CreateCompatibleBitmap(hDCSrc, WidthSrc, HeightSrc)
hBmpPrev = SelectObject(hDCMemory, hBmp) '获得屏幕属性
RasterCapsScrn = GetDeviceCaps(hDCSrc, RASTERCAPS)
HasPaletteScrn = RasterCapsScrn And RC_PALETTE
PaletteSizeScrn = GetDeviceCaps(hDCSrc, SIZEPALETTE) '如果屏幕对象有调色板则获得屏幕调色板
If HasPaletteScrn And (PaletteSizeScrn = 256) Then
'建立屏幕调色板的拷贝
LogPal.palVersion = &H300
LogPal.palNumEntries = 256
r = GetSystemPaletteEntries(hDCSrc, 0, 256, LogPal.palPalEntry(0))
hPal = CreatePalette(LogPal)
'将新建立的调色板选如建立的内存绘图句柄中
hPalPrev = SelectPalette(hDCMemory, hPal, 0)
r = RealizePalette(hDCMemory)
End If '拷贝图象
r = BitBlt(hDCMemory, 0, 0, WidthSrc, HeightSrc, hDCSrc, LeftSrc, TopSrc, vbSrcCopy) hBmp = SelectObject(hDCMemory, hBmpPrev) If HasPaletteScrn And (PaletteSizeScrn = 256) Then
hPal = SelectPalette(hDCMemory, hPalPrev, 0)
End If '释放资源
r = DeleteDC(hDCMemory)
r = ReleaseDC(hWndSrc, hDCSrc) Set CaptureWindow = CreateBitmapPicture(hBmp, hPal)
End FunctionPublic Function CreateBitmapPicture(ByVal hBmp As Long, ByVal hPal As Long) As Picture
Dim r As Long Dim Pic As PicBmp
Dim IPic As IPicture
Dim IID_IDispatch As GUID '填充IDispatch界面
With IID_IDispatch
.Data1 = &H20400
.Data4(0) = &HC0
.Data4(7) = &H46
End With '填充Pic
With Pic
.Size = Len(Pic) ' Pic结构长度
.Type = vbPicTypeBitmap ' 图象类型
.hBmp = hBmp ' 位图句柄
.hPal = hPal ' 调色板句柄
End With '建立Picture图象
r = OleCreatePictureIndirect(Pic, IID_IDispatch, 1, IPic) '返回Picture对象
Set CreateBitmapPicture = IPic
End Functionfrom1.frm中的代码如下:Private Sub Command1_Click()
picName = Year(Now()) & Right("0" + CStr(Month(Now())), 2) & Right("0" + CStr(Day(Now())), 2) & Right("0" + CStr(Hour(Now())), 2) & Right("0" + CStr(Minute(Now())), 2) & Right("0" + CStr(Second(Now())), 2)
picName = App.Path & "\" & picName & ".jpg"
Set Picture1.Picture = CaptureActiveWindow()
SavePicture Picture1.Picture, picName
Me.SetFocus
end sub
1024*768*2=1572864,也就是1.5M
SAVEPICTURE并不是说你把保存文件的名字改成JPG就变成JPG格式了,它实际上还是一个BMP,不信你用ACDSEE打开看看,它会表明这个图片的格式的.
完全用VB写JPG格式转换比较麻烦,建议你看一下GDI+,可以很简单快速地转换图片格式.
'保存的图片实际上是bmp格式,减小图片大小需要另外用算法转化压缩调整图片质量
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(0 To 7) As Byte
End TypePrivate Type GdiplusStartupInput
GdiplusVersion As Long
DebugEventCallback As Long
SuppressBackgroundThread As Long
SuppressExternalCodecs As Long
End TypePrivate Type EncoderParameter
GUID As GUID
NumberOfValues As Long
Type As Long
Value As Long
End TypePrivate Type EncoderParameters
count As Long
Parameter As EncoderParameter
End Type
Private Declare Function GdiplusStartup Lib "GDIPlus" (token As Long, inputbuf As GdiplusStartupInput, Optional ByVal outputbuf As Long = 0) As Long
Private Declare Function GdiplusShutdown Lib "GDIPlus" (ByVal token As Long) As Long
Private Declare Function GdipCreateBitmapFromHBITMAP Lib "GDIPlus" (ByVal hbm As Long, ByVal hPal As Long, BITMAP As Long) As Long
Private Declare Function GdipDisposeImage Lib "GDIPlus" (ByVal Image As Long) As Long
Private Declare Function GdipSaveImageToFile Lib "GDIPlus" (ByVal Image As Long, ByVal FileName As Long, clsidEncoder As GUID, encoderParams As Any) As Long
Private Declare Function CLSIDFromString Lib "ole32" (ByVal Str As Long, id As GUID) As Long
Private Declare Function CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Dest As Any, Src As Any, ByVal cb As Long) As LongPublic Sub SavePic(ByVal pict As StdPicture, ByVal FileName As String, PicType As String, _
Optional ByVal Quality As Byte = 80, _
Optional ByVal TIFF_ColorDepth As Long = 24, _
Optional ByVal TIFF_Compression As Long = 6) Screen.MousePointer = vbHourglass
Dim tSI As GdiplusStartupInput
Dim lRes As Long
Dim lGDIP As Long
Dim lBitmap As Long
Dim aEncParams() As Byte
On Error GoTo ErrHandle:
tSI.GdiplusVersion = 1 ' 初始化 GDI+
lRes = GdiplusStartup(lGDIP, tSI)
If lRes = 0 Then ' 从句柄创建 GDI+ 图像
lRes = GdipCreateBitmapFromHBITMAP(pict.Handle, 0, lBitmap)
If lRes = 0 Then
Dim tJpgEncoder As GUID
Dim tParams As EncoderParameters '初始化解码器的GUID标识
Select Case PicType
Case ".jpg"
CLSIDFromString StrPtr("{557CF401-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder
tParams.count = 1 ' 设置解码器参数
With tParams.Parameter ' Quality
CLSIDFromString StrPtr("{1D5BE4B5-FA4A-452D-9CDD-5DB35105E7EB}"), .GUID ' 得到Quality参数的GUID标识
.NumberOfValues = 1
.Type = 4
.Value = VarPtr(Quality)
End With
ReDim aEncParams(1 To Len(tParams))
Call CopyMemory(aEncParams(1), tParams, Len(tParams))
Case ".png"
CLSIDFromString StrPtr("{557CF406-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder
ReDim aEncParams(1 To Len(tParams))
Case ".gif"
CLSIDFromString StrPtr("{557CF402-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder
ReDim aEncParams(1 To Len(tParams))
Case ".tiff"
CLSIDFromString StrPtr("{557CF405-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder
tParams.count = 2
ReDim aEncParams(1 To Len(tParams) + Len(tParams.Parameter))
With tParams.Parameter
.NumberOfValues = 1
.Type = 4
CLSIDFromString StrPtr("{E09D739D-CCD4-44EE-8EBA-3FBF8BE4FC58}"), .GUID ' 得到ColorDepth参数的GUID标识
.Value = VarPtr(TIFF_Compression)
End With
Call CopyMemory(aEncParams(1), tParams, Len(tParams))
With tParams.Parameter
.NumberOfValues = 1
.Type = 4
CLSIDFromString StrPtr("{66087055-AD66-4C7C-9A18-38A2310B8337}"), .GUID ' 得到Compression参数的GUID标识
.Value = VarPtr(TIFF_ColorDepth)
End With
Call CopyMemory(aEncParams(Len(tParams) + 1), tParams.Parameter, Len(tParams.Parameter))
Case ".bmp" '可以提前写保存为BMP的代码,因为并没有用GDI+
SavePicture pict, FileName
Screen.MousePointer = vbDefault
Exit Sub
End Select
lRes = GdipSaveImageToFile(lBitmap, StrPtr(FileName), tJpgEncoder, aEncParams(1)) '保存图像
GdipDisposeImage lBitmap ' 销毁GDI+图像
End If
GdiplusShutdown lGDIP '销毁 GDI+
End If
Screen.MousePointer = vbDefault
Erase aEncParams
Exit Sub
ErrHandle:
Screen.MousePointer = vbDefault
MsgBox "在保存图片的过程中发生错误:" & vbCrLf & vbCrLf & "错误号: " & Err.Number & vbCrLf & "错误描述: " & Err.Description, vbInformation Or vbOKOnly, "错误"
End Sub
我用SavePic Picture1.Picture, picName提示参数不可显我用 savepic picture1.picture,"1.jpg",1 提示在保存图片的过程中发生错误 错误号: 9 错误描述: 下标越界
savepic picture1.picture, picName,".jpg",90