嗨，我有这段代码可以将我的面板发送到打印机，但问题是它不允许我选择我将使用的打印机，我知道如何让打印机窗口出现？谢谢
Public Class Form1
Dim img As Bitmap
Dim WithEvents pd As PrintDocument
'Returns the Form as a bitmap
Function CaptureForm1() As Bitmap
Dim g1 As Graphics = Me.CreateGraphics()
Dim MyImage = New Bitmap(Me.ClientRectangle.Width, (Me.ClientRectangle.Height), g1)
Dim g2 As Graphics = Graphics.FromImage(MyImage)
Dim dc1 As IntPtr = g1.GetHdc()
Dim dc2 As IntPtr = g2.GetHdc()
BitBlt(dc2, 0, 0, Me.ClientRectangle.Width, (Me.ClientRectangle.Height), dc1, 0, 0, 13369376)
g1.ReleaseHdc(dc1)
g2.ReleaseHdc(dc2)
'saves image to c drive just, u can comment it also
'MyImage.Save("c:\abc.bmp")
Return MyImage
End Function
<DllImport("gdi32.DLL", EntryPoint:="BitBlt", _
SetLastError:=True, CharSet:=CharSet.Unicode, _
ExactSpelling:=True, _
CallingConvention:=CallingConvention.StdCall)> _
Private Shared Function BitBlt(ByVal hdcDest As IntPtr, ByVal nXDest As Integer, ByVal nYDest As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer, ByVal hdcSrc As IntPtr, ByVal nXSrc As Integer, ByVal nYSrc As Integer, ByVal dwRop As System.Int32) As Boolean
' Leave function empty - DLLImport attribute forwards calls to MoveFile to
' MoveFileW in KERNEL32.DLL.
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
img = CaptureForm1()
pd = New PrintDocument
pd.Print()
End Sub
'this method will be called each time when pd.printpage event occurs
Sub pd_PrintPage(ByVal sender As Object, ByVal e As PrintPageEventArgs) Handles pd.PrintPage
Dim x As Integer = e.MarginBounds.X
Dim y As Integer = e.MarginBounds.Y
e.Graphics.DrawImage(img, x, y)
e.HasMorePages = False
End Sub
End Class