Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal X As Long, ByVal Y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As LongPrivate Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As LongPrivate Declare Function GdiplusStartup Lib "GDIPlus" (token As Long, inputbuf As GdiplusStartupInput, ByVal outputbuf As Long) As LongPrivate Declare Function GdiplusShutdown Lib "GDIPlus" (ByVal token As Long) As LongPrivate Declare Function GdipCreateBitmapFromHBITMAP Lib "GDIPlus" (ByVal hbm As Long, ByVal hpal As Long, Bitmap As Long) As LongPrivate Declare Function GdipDisposeImage Lib "GDIPlus" (ByVal Image As Long) As LongPrivate Declare Function GdipSaveImageToFile Lib "GDIPlus" (ByVal Image As Long, ByVal filename As Long, clsidEncoder As GUID, encoderParams As Any) As LongPrivate Declare Function CLSIDFromString Lib "ole32" (ByVal str As Long, id As GUID) As LongPrivate Declare Function GdipCreateBitmapFromFile Lib "GDIPlus" (ByVal filename As Long, Bitmap As Long) As LongPrivate Type GUID Data1 As Long Data2 As Integer Data3 As Integer Data4(0 To 7) As ByteEnd TypePrivate Type GdiplusStartupInput GdiplusVersion As Long DebugEventCallback As Long SuppressBackgroundThread As Long SuppressExternalCodecs As LongEnd TypePrivate Type EncoderParameter GUID As GUID NumberOfValues As Long type As Long Value As LongEnd TypePrivate Type EncoderParameters Count As Long Parameter As EncoderParameterEnd TypePrivate Sub Form_Load()Dim rFN As StringDim ret As BooleanrFN = getFNMe.HideMe.AutoRedraw = TruePicture1.Width = Screen.Width + 30Picture1.Height = Screen.Height + 30BitBlt Picture1.hDC, 0, 0, Screen.Width + 30, Screen.Height + 30, GetDC(0), 0, 0, vbSrcCopySet Picture1.Picture = Picture1.Imageret = PictureBoxSaveJPG(Picture1.Picture, Replace(App.Path & "\" & rFN & ".JPG", "\\", "\")) '保存压缩后的图片EndEnd SubFunction getFN() As StringDim dD As String, tT As StringdD = Replace(CStr(Date), "-", ""): tT = Replace(CStr(Time), ":", "")tT = Replace(tT, "下午", "pm"): tT = Replace(tT, "上午", "am")getFN = Replace(dD & tT, " ", "")End FunctionPrivate Function PictureBoxSaveJPG(ByVal pict As StdPicture, ByVal filename As String, Optional ByVal quality As Byte = 80) As Boolean Dim tSI As GdiplusStartupInput Dim lRes As Long Dim lGDIP As Long Dim lBitmap As Long '初始化 GDI+ tSI.GdiplusVersion = 1 lRes = GdiplusStartup(lGDIP, tSI, 0) 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 CLSIDFromString StrPtr("{557CF401-1A04-11D3-9A73-0000F81EF32E}"), tJpgEncoder '设置解码器参数 tParams.Count = 1 With tParams.Parameter ' Quality '得到Quality参数的GUID标识 CLSIDFromString StrPtr("{1D5BE4B5-FA4A-452D-9CDD-5DB35105E7EB}"), .GUID .NumberOfValues = 1 .type = 4 .Value = VarPtr(quality) End With '保存图像 lRes = GdipSaveImageToFile(lBitmap, StrPtr(filename), tJpgEncoder, tParams) '销毁GDI+图像 GdipDisposeImage lBitmap End If '销毁 GDI+ GdiplusShutdown lGDIP End If If lRes Then PictureBoxSaveJPG = False Else PictureBoxSaveJPG = True End IfEnd Function
