Question

在vb中自己做了个画图程序，图片是画在picture控件上的，请问如何保存图片为.jpg或其它格式。

在vb中自己做了个画图程序，图片是画在picture控件上的，请问如何保存画好的图片。
图片保存的格式为。jpg或其它格式？请详细回答。
有高分！
要有代码！！！！！！！
一楼的不行啊

Answer 1

savepicture picture1.picture,"c:\a.bmp"
不可能不行的,VB6测试通过了
先把Picture1.autoredraw设成true

Answer 2

以下代码是BAIDU某网友在BAIDU贴出的代码:
Option Explicit
Private Const BI_RGB = 0&
Private Const DIB_RGB_COLORS = 0 ' color table in RGBs
Private Const BITMAPTYPE = &H4D42
Private Const INVALID_HANDLE_VALUE = (-1)
Private Const GENERIC_WRITE = &H40000000
Private Const CREATE_ALWAYS = 2
Private Const FILE_ATTRIBUTE_NORMAL = &H80
Private Type BITMAPINFOHEADER '40 bytes
biSize As Long
biWidth As Long
biHeight As Long
biPlanes As Integer
biBitCount As Integer
biCompression As Long
biSizeImage As Long
biXPelsPerMeter As Long
biYPelsPerMeter As Long
biClrUsed As Long
biClrImportant As Long
End Type
Private Type RGBQUAD
rgbBlue As Byte
rgbGreen As Byte
rgbRed As Byte
rgbReserved As Byte
End Type
Private Type BITMAPINFO
bmiHeader As BITMAPINFOHEADER
bmiColors As RGBQUAD
End Type
Private Type BITMAPFILEHEADER
bfType As Integer
bfSize As Long
bfReserved1 As Integer
bfReserved2 As Integer
bfOffBits As Long
End Type
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function CreateDIBSection Lib "gdi32" (ByVal hdc As Long, pBitmapInfo As BITMAPINFO, ByVal un As Long, lplpVoid As Long, ByVal handle As Long, ByVal dw As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
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 Long
Private Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, ByVal lpSecurityAttributes As Long, ByVal dwCreationDisposition As Long, ByVal dwFlagsAndAttributes As Long, ByVal hTemplateFile As Long) As Long
Private Declare Function WriteFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, ByVal lpOverlapped As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Sub Command1_Click()
Dim hmemDC As Long
Dim hmemBMP As Long
Dim lpmemBits As Long
Dim bmp_info As BITMAPINFO
Dim hFile As Long
Dim bmpfile_info As BITMAPFILEHEADER
Dim lpBytesWritten As Long
Picture1.ScaleMode = vbPixels
With bmp_info.bmiHeader
.biSize = LenB(bmp_info.bmiHeader)
.biWidth = Picture1.ScaleWidth
.biHeight = Picture1.ScaleHeight
.biPlanes = 1
.biBitCount = 24
.biCompression = BI_RGB
.biSizeImage = .biHeight * (((.biWidth * .biBitCount + 31) And &HFFFFFFE0) \ 8)
End With
hmemDC = CreateCompatibleDC(Picture1.hdc)
hmemBMP = CreateDIBSection(Picture1.hdc, bmp_info, DIB_RGB_COLORS, lpmemBits, 0, 0)
SelectObject hmemDC, hmemBMP
BitBlt hmemDC, 0, 0, bmp_info.bmiHeader.biWidth, bmp_info.bmiHeader.biHeight, Picture1.hdc, 0, 0, vbSrcCopy
'保存图片
hFile = CreateFile(App.Path & "\test.bmp", GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0)
If hFile <> INVALID_HANDLE_VALUE Then
With bmpfile_info
.bfType = BITMAPTYPE
.bfOffBits = 14 + bmp_info.bmiHeader.biSize
.bfSize = .bfOffBits + bmp_info.bmiHeader.biSizeImage
End With
WriteFile hFile, bmpfile_info.bfType, 2, lpBytesWritten, 0
WriteFile hFile, bmpfile_info.bfSize, 12, lpBytesWritten, 0
WriteFile hFile, bmp_info.bmiHeader, bmp_info.bmiHeader.biSize, lpBytesWritten, 0
WriteFile hFile, ByVal lpmemBits, bmp_info.bmiHeader.biSizeImage, lpBytesWritten, 0
CloseHandle hFile
End If
DeleteObject hmemBMP
DeleteDC hmemDC
End Sub