VB.net中如何用timer控件编出一个简单的倒计时器？

Public Class Form1

Dim tCount As Integer '用来计数

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
tCount = 10
Timer1.Interval = 1000 '每秒执行一次
Timer1.Enabled = True
End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
tCount -= 1
If tCount = 0 Then
MsgBox("时间到")
Timer1.Enabled = False
End If
End Sub
End Class本回答被网友采纳

全局变量

每次--就对了

用Timer控件吧，设置1秒执行1次。然后直接在Timer中写代码，将全全局的值来 减减1，如果值为0，则停止Timer 跳出提示框
以下示例：
int Tatal = 100;
Timer.Inveral = 1000;
Timer_()
{
if ( Tatal == 0)
{
MessageBox.Show("完成！");
Timer.Stop();
}
else
{
Tatal --;
}
}