窗口淡出淡出的有关问题

窗口淡出淡出的问题
通过TIMER控件设置FORM.Opacity属性

程序启动时 Me.Opacity = Me.Opacity + 0.1
点退出按钮后 Me.Opacity = Me.Opacity - 0.1

为什么点退出按钮后窗口淡出时，窗口内的所有控件全部变黑闪一下，然后再开始逐渐透明啊。（启动淡入时没这个问题）



PS：点窗口右上角的错叉按钮后，想要运行的代码在哪里添加。

[解决办法]

VB.NET code

Public Class Form1    Dim sped As Single    Dim WithEvents timer1 As New Timer()    Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing        e.Cancel = True        Timer1.Enabled = True    End Sub    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load        sped = 0.02        Timer1.Interval = 10        Timer1.Enabled = False    End Sub    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles timer1.Tick        Me.Opacity -= sped        If Me.Opacity <= sped Then            Me.Close()            Me.Dispose()        End If    End SubEnd Class