我给按钮添加两张png格式照片作为背景，当鼠标移动到按钮上面时切换图片以达到动态效果，现在问题是：怎样令到按钮的边框自适应的随图片的边框成为圆形啊？我已经将按钮的FlayStyle设为Flat了，而且FlatAppearance中的BorderSize也设为0了,但是,运行的时候还是有按钮的边框.求解!在线等............
初始运行图: ;鼠标移动到按钮上,边框出现

贴上源码

Public Class Form1
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Button1.BackgroundImage = My.Resources.a
    End Sub

    Private Sub Button1_MouseLeave(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.MouseLeave
        Button1.BackgroundImage = My.Resources.a
    End Sub

    Private Sub Button1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Button1.MouseMove
        Button1.BackgroundImage = My.Resources.b

    End Sub
End Class

请参照：vb2010如何制作圆形图片框
https://bbs.bccn.net/thread-468709-1-1.html

版主，谢谢指点！可以参考使用，如果轮廓再圆润一点就完美了。。。。