vb.net实现无标题栏窗体可拖动

    'Win32 API
    Declare Auto Function ReleaseCapture Lib "user32.dll" Alias "ReleaseCapture" () As Boolean
    Declare Auto Function SendMessage Lib "user32.dll" Alias "SendMessage" (ByVal hWnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As IntPtr
    'Win32 Message
    Private Const WM_SYSCOMMAND As Integer = &H112&
    Private Const SC_MOVE As Integer = &HF010&
    Private Const HTCAPTION As Integer = &H2&
    Private Sub frmLogin_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseMove
        If e.Button = MouseButtons.Left Then
            ReleaseCapture()
            SendMessage(Me.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0)
        End If
    End Sub