vb 移动无边框窗体的函数

'******************************************
Private oOriginalRegion As Region = Nothing
' 用于窗体移动
Private bFormDragging As Boolean = False
Private oPointClicked As Point
'******************************************
Private Sub Label1_MouseDown1(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Label1.MouseDown

Me.bFormDragging = True
Me.oPointClicked = New Point(e.X, e.Y)

End Sub

Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)

Me.bFormDragging = True
Me.oPointClicked = New Point(e.X, e.Y)

End Sub
'******************************************
Private Sub Form1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseUp
Me.bFormDragging = False
End Sub
'******************************************
Private Sub Form1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseMove
If Me.bFormDragging Then
Dim oMoveToPoint As Point
' 以当前鼠标位置为基础，找出目标位置
oMoveToPoint = Me.PointToScreen(New Point(e.X, e.Y))
' 根据开始位置作出调整
oMoveToPoint.Offset(Me.oPointClicked.X * -1, (Me.oPointClicked.Y + SystemInformation.CaptionHeight + SystemInformation.BorderSize.Height - 25) * -1)
' 移动窗体
Me.Location = oMoveToPoint
End If
End Sub
我这是vb。net，要在vb中用的话，稍微改动一下。