如何拖动没有边框的窗体？

这个功能在VB6中，需要借助于API函数才能实现。而在VB.net中，凭自己的功能就能实现。首先设置窗体的FormBorderStyle属性为none以去掉窗体的边框，然后在窗体上添加一个按钮。窗体中的代码如下：

Public Class Form1

Inherits System.<a href="http://dev.21tx.com/os/windows/" target="_blank">Windows</a>.Forms.Form

Private mouse_offset As Point

Private Sub form1_MouseDown(ByVal sender As Object, _

ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown

mouse_offset = New Point(e.X, e.Y)

End Sub

Private Sub form1_MouseMove(ByVal Sender As System.Object, _

ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseMove

'按住鼠标左右键均可拖动窗体

If e.Button = MouseButtons.Left Or e.Button = MouseButtons.Right Then

Dim mousePos As Point = Sender.findform().MousePosition

'获得鼠标偏移量

mousePos.Offset(-mouse_offset.X, -mouse_offset.Y)

'设置窗体随鼠标一起移动

Sender.findform().Location = mousePos

End If

End Sub

Private Sub BtnExit_Click(ByVal sender As System.Object, _

ByVal e As System.EventArgs) Handles Button1.Click

'关闭窗体

Me.Close()

End Sub

End Class