Public Class Form1
 
    Private mouseOffset As Point
    Private isMouseDown As Boolean = False
 
 Button1_Click(boton)
        Me.Close()
   'cierra el formulario
    End Sub
 
 Evento MouseDown
 
        Dim xOffset As Integer
        Dim yOffset As Integer
        If e.Button = MouseButtons.Left Then
            xOffset = -e.X - SystemInformation.FrameBorderSize.Width
            yOffset = -e.Y - SystemInformation.CaptionHeight - _
                    SystemInformation.FrameBorderSize.Height
            mouseOffset = New Point(xOffset, yOffset)
            isMouseDown = True
        End If
    End Sub
 
Evento MouseMove
 
        If isMouseDown Then
            Dim mousePos As Point = Control.MousePosition
            mousePos.Offset(mouseOffset.X, mouseOffset.Y)
            Location = mousePos
        End If
    End Sub
 
Evento  MouseUp del formulario
        If e.Button = MouseButtons.Left Then
            isMouseDown = False
        End If
    End Sub
 
    Protected Overrides Sub OnPaint( _
       ByVal e As System.Windows.Forms.PaintEventArgs)
        Dim shape As New System.Drawing.Drawing2D.GraphicsPath
        shape.AddEllipse(0, 0, Me.Width, Me.Height)
        Me.Region = New System.Drawing.Region(shape)
    End Sub
 
 
End Class