타이틀바가 없는 윈도우폼 드레그

  
    Private Sub Form_MouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown
        Dim xOffset As Integer
        Dim yOffset As Integer

        If e.Button = MouseButtons.Left Then
            xOffset = -e.X - SystemInformation.FixedFrameBorderSize.Width
            yOffset = -e.Y - SystemInformation.FixedFrameBorderSize.Height
            mouseOffset = New Point(xOffset, yOffset)
            isMouseDown = True
        End If
    End Sub

    Private Sub Form_MouseMove(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseMove
        If isMouseDown Then
            Dim mousePos As Point = Control.MousePosition
            mousePos.Offset(mouseOffset.X, mouseOffset.Y)
            Location = mousePos
        End If
    End Sub

    Private Sub Form_MouseUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseUp
        If e.Button = MouseButtons.Left Then
            isMouseDown = False
        End If
    End Sub