vb中如何让picturebox画出的图形保存为图片格式

[coffeekane]

问：我在picturebox控件中用line\circle等绘图命令画出图形后，希望将得到的图形保存为jpg\gif等图片格式，如何实现？请教各位大虾们！：）谢！！

pls:用如下程序得到的只是空白图。请大虾们看看我下面的程序有什么问题：）

Private Sub Command2_Click()
Call SavePic("D:\毕设答辩准备\vb\vb保存pic", "good.jpg")
End Sub

Public Function SavePic(PicPath As String, PicName As String)
'调用绘图程序来保存图片
Dim RTV

Dim i, j As Integer
Dim fso As New FileSystemObject
RTV = Shell("mspaint.exe", vbMaximizedFocus) ' 激活绘图程序。
'Sleep (1000)
AppActivate RTV, True
SendKeys "^v", True '粘贴完毕
SendKeys "%f", True '保存图片
SendKeys "^a", True
SendKeys PicPath & "\" & PicName, True '保存路径和名称
If fso.FileExists(PicPath & "\" & PicName) = True Then '检测图片是否存在
SendKeys "{TAB}", True
SendKeys "{TAB}", True
SendKeys "{ENTER}", True
SendKeys "{TAB}", True
SendKeys "{ENTER}", True
Else
SendKeys "{ENTER}", False
SendKeys "{ENTER}", False
End If
SendKeys "%{F4}", True
Clipboard.Clear
End Function

[VBToy]

如果在xp下可用GDI+的API将绘制的图形保存为jpg格式。否则，找将BMP保存为JPG的源代码或dll。

[_西瓜皮_]

VB本身不允许你将一个Form?UserControl或PictureBox上的完整图片复制到剪贴板?
如果你使用Clipboard.SetData，将只复制被载入这个对象的位图。通过使用API方法，
你可以超越这个限制，保证全部内容都被复制，包括你刚刚画上的任何图形。
开始一个新项目，在窗体上放置一个Command和一个PictureBox。将PictureBox的Autoredraw属性设为1。
然后添加一个标准模块，把以下代码复制进去。


Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type

'GDI函数：
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 Const SRCCOPY = &HCC0020 ' (DWORD) dest = source
'创建一个memory DC：
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hDC As Long) As Long
'在memory中建立一个位图：
Private Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hDC As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
'把一个GDI对象放入DC，返回原先的那个：
Private Declare Function SelectObject Lib "gdi32" (ByVal hDC As Long, ByVal hObject As Long) As Long
'删除GDI对象：
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long

'剪贴板函数：
Private Declare Function OpenClipboard Lib "USER32" (ByVal hWnd As Long) As Long
Private Declare Function CloseClipboard Lib "USER32" () As Long
Private Declare Function SetClipboardData Lib "USER32" (ByVal wFormat As Long, ByVal hMem As Long) As Long
Private Declare Function EmptyClipboard Lib "USER32" () As Long
Private Const CF_BITMAP = 2


Public Function CopyEntirePicture(ByRef objFrom As Object) As Boolean
Dim lhDC As Long
Dim lhBMP As Long
Dim lhBMPOld As Long

'在内存中建立一个指向我们将要复制对象的DC：
lhDC = CreateCompatibleDC(objFrom.hDC)
If (lhDC <> 0) Then
'建立一张指向将要复制对象的位图：
lhBMP = CreateCompatibleBitmap(objFrom.hDC, objFrom.ScaleWidth \ Screen.TwipsPerPixelX, objFrom.ScaleHeight \ Screen.TwipsPerPixelY)
If (lhBMP <> 0) Then
'把位图选入我们刚才建立的DC中，并贮存原先在那里的老位图：
lhBMPOld = SelectObject(lhDC, lhBMP)

'把objFrom的内容复制到建立的位图里：
BitBlt lhDC, 0, 0, objFrom.ScaleWidth \ Screen.TwipsPerPixelX, objFrom.ScaleHeight \ Screen.TwipsPerPixelY, objFrom.hDC, 0, 0, SRCCOPY

'恢复DC中的内容：
SelectObject lhDC, lhBMPOld

'现在把位图装入剪贴板：
EmptyClipboard
OpenClipboard 0
SetClipboardData CF_BITMAP, lhBMP
CloseClipboard

'我们在这里不用删除建立的位图——
'它现在属于剪贴板，当剪贴板变化时，Windows将为我们删除它。
End If

'清除刚才建立的DC：
DeleteObject lhDC
End If
End Function

'为了试验这个方法，把这些代码加入窗体：
Private Sub Command1_Click()
CopyEntirePicture Picture1
End Sub

Private Sub Command2_Click()
SavePicture Clipboard.GetData, "D:\12.bmp"
End Sub

Private Sub Form_Load()
Dim i As Long
'在PictureBox中画些东西：
With Picture1.Font
.Name = "Arial"
.Bold = True
.Size = 12
End With
For i = 1 To 20
Picture1.ForeColor = QBColor(i Mod 15)
Picture1.Print "http://www.archtide.com"
Next i
End Sub

窗体加载后，PictureBox中将会有一些文本。当你点击Command后，
PictureBox中的全部内容都将会被复制到剪贴板里，你可以把它粘贴到别的程序里，
比如画笔、Word等等。

[coffeekane]

谢谢各位大虾提供的参考！现已成功实现。
就此结贴！
再谢各位！