桌面下雪程序
完整版本，下雪了
C# code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Threading;
namespace WindowsApplication30
{
public partial class frmDesktopSnow : Form
{
///
/// 下雪啦
///
[DllImport("User32.dll ", EntryPoint = "FindWindow")]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("User32.dll ")]
static extern IntPtr FindWindowEx(IntPtr parent, IntPtr childe, string
strclass, string strname);
List
SnowPoints = new List();
List SnowRate = new List();
Bitmap Bmp = new Bitmap(Screen.PrimaryScreen.Bounds.Width,
Screen.PrimaryScreen.Bounds.Height);
IntPtr DesktopHandle = IntPtr.Zero;
#region public frmDesktopSnow() // 构造函数
///
/// 构造函数
///
public frmDesktopSnow()
{
InitializeComponent();
this.FormBorderStyle = FormBorderStyle.None;
BtnStart.Size = new Size(100, 70);
BtnClose.Size = new Size(100, 70);
BtnStart.Location = new Point(0, 0);
BtnClose.Location = new Point(101, 0);
BtnStart.Text = "点一下吧";
BtnClose.Text = "关闭";
this.Size = new Size(BtnClose.Right, BtnClose.Bottom);
this.Opacity = 0.8;
}
#endregion
#region void SnowTimer_Tick(object sender, EventArgs e) // 下雪计时器事件
///
/// 下雪计时器事件
///
/// 计时器本身
/// 计时器参数
void SnowTimer_Tick(object sender, EventArgs e)
{
Graphics DesktopGraphics = Graphics.FromHwnd(DesktopHandle);
String Text = "圣诞快到了，希望大家身体健康～";
if (Convert.ToInt32(SnowTimer.Tag) == 0)
DesktopGraphics.DrawString(Text, new Font("宋体", 10), new
SolidBrush(Color.Red),
new PointF(Screen.PrimaryScreen.Bounds.Width / 2 - 200, Screen.PrimaryScreen.Bounds.Height / 2));
else
DesktopGraphics.DrawString(Text, new Font("宋体", 10), new
SolidBrush(Color.Green),
new PointF(Screen.PrimaryScreen.Bounds.Width / 2 - 200, Screen.PrimaryScreen.Bounds.Height / 2));
SnowTimer.Tag = 1 - Convert.ToInt32(SnowTimer.Tag);
for (int i = 0; i < SnowPoints.Count; i++)
{
DesktopGraphics.DrawImage(Bmp, SnowPoints[i].X, SnowPoints[i].Y, new Rectangle(SnowPoints[i], PbSnow.Size),
GraphicsUnit.Pixel);
SnowPoints[i] = new Point(SnowPoints[i].X, SnowPoints[i].Y + SnowRate[i]);
if (SnowPoints[i].Y > Screen.PrimaryScreen.Bounds.Bottom)
SnowPoints[i] = new Point(SnowPoints[i].X, 0);
DesktopGraphics.DrawImage(PbSnow.Image, SnowPoints[i]); // PbSnow.Image 小雪花图片
}
DesktopGraphics.Dispose();
}
#endregion
#region void BtnStart_Click(object sender, EventArgs e) // 下雪
///
/// 开始下雪
///
/// 按钮本身
/// 按钮
void BtnStart_Click(object sender, EventArgs e)
{
SnowPoints.Clear();
Random R = new Random();
for (int i = 0; i < 50; i++)
{
SnowPoints.Add(new
Point(R.Next(Screen.PrimaryScreen.Bounds.Width),
R.Next(Screen.PrimaryScreen.Bounds.Height)));
SnowRate.Add(R.Next(10));
}
ShowDesktop();
this.WindowState = FormWindowState.Minimized;
Thread.Sleep(500); // 等待桌面完全显示
Graphics G = Graphics.FromImage(Bmp);
G.CopyFromScreen(new Point(0, 0), new
Point(Screen.PrimaryScreen.Bounds.Left, Screen.PrimaryScreen.Bounds.Top),
new Size(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height));
G.Dispose();
this.WindowState = FormWindowState.Normal;
IntPtr P = FindWindow("Progman", "Program Manager");
P = FindWindowEx(P, IntPtr.Zero, "SHELLDLL_DefView", null);
DesktopHandle = FindWindowEx(P, IntPtr.Zero, "SysListView32", null);
SnowTimer.Interval = 1;
SnowTimer.Enabled = true; // 开始下雪
}
#endregion
#region void BtnClose_Click(object sender, EventArgs e) // 关闭
///
/// 关闭
///
/// 窗口本身
/// 窗口参数
void BtnClose_Click(object sender, EventArgs e)
{
ShowDesktop();
Close();
}
#endregion
#region static void ShowDesktop() // 显示桌面
///
/// 显示桌面
///
static void ShowDesktop()
{
Type OleType = Type.GetTypeFromProgID("Shell.Application");
object OleObject = System.Activator.CreateInstance(OleType);
OleType.InvokeMember("ToggleDesktop", BindingFlags.InvokeMethod, null,
OleObject, null);
}
#endregion
}
} 小雪花图片用网上有的小雪花矢量图jpg或bmp用photoshop把背景颜色的区域删掉镂空成透明保存成GIF然后导入PbSnow PictureBox控件
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