建立新的项目文件，添加模块文件，并填写如下代码：
Public Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert As Long) As Long
＇在窗体中添加两个按钮和一个计时器，并用设置以下属性：
command1.Caption = "开始"
command2.Caption = "停止"
Timer1.INTERVAL = 500 ＇每0.5秒闪烁一次
Timer1.Enabled = False
Private Sub Timer1_Timer()
a& = FlashWindow(Me.hwnd, 1)
End Sub
Private Sub Command1_Click()
Timer1.Enabled = True
End Sub
Private Sub Command2_Click()
Timer1.Enabled = False
End Sub