caozhy进来帮下忙，谢谢
VB代码
Public Class Form1
Declare Function SendMessageW Lib "user32" (ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer
Protected Overrides Sub OnMouseDown(e As MouseEventArgs)
MyBase.OnMouseDown(e)
If e.Button = MouseButtons.Left Then
Capture = False
SendMessageW(Me.Handle, &HA1, 2, 0)
End If
End Sub
End Class

如果在窗体里有个Panel控件，我在Panel按下鼠标拖动，想窗体跟着移动，应该怎么搞。
[解决办法]
http://www.pconline.com.cn/pcedu/empolder/net/0409/452601.html
[解决办法]

Public Class Form1

    Declare Function SendMessageW Lib "user32" (ByVal hwnd As Integer, ByVal uMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer

    Declare Function SetWindowLongW Lib "user32" (ByVal hWnd As Integer, ByVal ndx As Integer, ByVal newValue As callbacktype) As Integer

    Declare Function SetWindowLongW Lib "user32" (ByVal hWnd As Integer, ByVal ndx As Integer, ByVal newValue As Integer) As Integer

    Private Declare Function CallWindowProcW Lib "user32" (ByVal lpPrevWndFunc As Integer, ByVal hWnd As Integer, ByVal Msg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer

    Const GWL_WNDPROC As Integer = -4

    Const WM_LBUTTONDOWN As Integer = &H201

    Private oldProcAddr As Integer

    Delegate Function callbacktype(ByVal hWnd As Integer, ByVal uMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer

    Private Sub Form1_FormClosed(sender As Object, e As FormClosedEventArgs) Handles Me.FormClosed
        SetWindowLongW(Panel1.Handle, GWL_WNDPROC, oldProcAddr)
    End Sub

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        oldProcAddr = SetWindowLongW(Panel1.Handle, GWL_WNDPROC, AddressOf callback)
    End Sub

    Function callback(ByVal hWnd As Integer, ByVal uMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer

        Select Case uMsg
            Case WM_LBUTTONDOWN
                SendMessageW(Me.Handle, &HA1, 2, 0)
            Case Else
                Return CallWindowProcW(oldProcAddr, hWnd, uMsg, wParam, lParam)
        End Select
        Return 0
    End Function
End Class