VB.NET 拖動無邊框的窗體

'******************************************
Private oOriginalRegion As Region = Nothing
' 用於窗體移動
Private bFormDragging As Boolean = False
Private oPointClicked As Point

'******************************************

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

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
' 以當前鼠標位置爲基礎，找出目標位置
oMoveToPoint = Me.PointToScreen(New Point(e.X, e.Y))
' 根據開始位置作出調整
oMoveToPoint.Offset(Me.oPointClicked.X * -1, _
(Me.oPointClicked.Y + _
SystemInformation.CaptionHeight + _
SystemInformation.BorderSize.Height) * -1)
' 移動窗體
Me.Location = oMoveToPoint
End If

End Sub