效果图：


复制代码 代码如下:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.ServiceModel;
using System.Runtime.InteropServices;
namespace MyWeather
{
public partial class Form1 : Form
{
[StructLayout(LayoutKind.Sequential)]
public struct MARGINS
{
public int Left;
public int Right;
public int Top;
public int Bottom;
}
[DllImport("dwmapi.dll", PreserveSig = false)]
static extern void DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS margins);
[DllImport("dwmapi.dll", PreserveSig = false)]
static extern bool DwmIsCompositionEnabled();
public Form1()
{
InitializeComponent();
}
protected override void OnLoad(EventArgs e)
{
if (DwmIsCompositionEnabled())
{
MARGINS margins = new MARGINS();
margins.Right = margins.Left = margins.Top = margins.Bottom = this.Width + this.Height;
DwmExtendFrameIntoClientArea(this.Handle, ref margins);
}
base.OnLoad(e);
}
protected override void OnPaintBackground(PaintEventArgs e)
{
base.OnPaintBackground(e);
if (DwmIsCompositionEnabled())
{
e.Graphics.Clear(Color.Black);
}
}
}
}