winfrom画面渐变显示

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace OpcityTest { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void timer1_Tick(object sender, EventArgs e) { if (this.Opacity < 1) { this.Opacity = this.Opacity + 0.1; } else { this.timer1.Enabled = false; } } private void Form1_Load(object sender, EventArgs e) { this.timer1.Enabled = true; this.Opacity = 0; } } } 

winfrom设置其Opacity属性为：50%