屏幕保存的问题。急！！！

[etie]

小弟想保存当前屏幕。
比如：在form上有个按钮。当我点击这个按钮的时候就系统就把当前窗口保存下来，然后自动弹出保存对话框，输入保存文件的名称和选择路径后点对话框上的“保存”按钮就可以把当前窗口以图像文件格式保存到选择的路径下。
请大虾务必指教阿。小弟先谢过大虾

[etie]

感谢嘿呀前辈指导。没啥说的，结分

[VBDN]

Const VK_SNAPSHOT As Byte = &H2C
Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Private Sub Command1_Click()
Call keybd_event(VK_SNAPSHOT, 0, 0, 0) ' 把应用窗口图象放到剪贴板，相当于按下了键盘上的 Alt+PrintScr
DoEvents
CommonDialog1.Filter = "位图文件(*.bmp)|*.bmp|"
CommonDialog1.ShowSave
If CommonDialog1.FileName <> "" Then
SavePicture Clipboard.GetData, CommonDialog1.FileName '保存捕捉的图片
Shell "C:\Program Files\Accessories\MSPAINT.EXE " & CommonDialog1.FileName, vbNormalFocus '用画图程序打开刚才保存的图片进行察看
End If
End Sub

[julysixth]

Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As Long

Private Declare Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As Long

Private Declare Function EmptyClipboard Lib "user32" () As Long

Private Declare Function SetClipboardData Lib "user32" (ByVal wFormat As Long, _
ByVal hMem As Long) As Long

Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, _
ByVal hObject As Long) As Long

Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc 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 CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long

Private Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hdc As Long, _
ByVal nWidth As Long, ByVal nHeight As Long) As Long

Private Declare Function CloseClipboard Lib "user32" () As Long

Private Declare Function CreateDC Lib "gdi32" Alias "CreateDCA" (ByVal lpDriverName As String, _
ByVal lpDeviceName As String, ByVal lpOutput As String, lpInitData As Long) As Long

Private Sub Command1_Click()'''抓图
Me.Visible = False
SourceDC = CreateDC("DISPLAY", 0, 0, 0)
DestDC = CreateCompatibleDC(SourceDC)
Bhandle = CreateCompatibleBitmap(SourceDC, 800, 600)
SelectObject DestDC, Bhandle
BitBlt DestDC, 0, 0, 800, 600, SourceDC, 0, 0, &HCC0020
Wnd = Screen.ActiveForm.hwnd
OpenClipboard Wnd
EmptyClipboard
SetClipboardData 2, Bhandle
CloseClipboard
DeleteDC DestDC
ReleaseDC Dhandle, SourceDC
Me.Picture = Clipboard.GetData()
Me.Visible = True
End Sub

Private Sub Command2_Click()
Me.Picture = Me.Image
'保存捕捉的图片
CommonDialog1.Filter = "BMP文件(*.bmp)|*.bmp|JPG文件(*.jpg)|*.jpg"
CommonDialog1.ShowSave
CommonDialog1.Flags = &H2 + &H4 + &H8
If CommonDialog1.FileName <> "" Then
SavePicture Me.Picture, CommonDialog1.FileName
End If
End Sub