代码
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Reflection; using System.Runtime.InteropServices;//引用DLL申明 namespace WindowsFormsApplication1 { public partial class Form1 : Form { //DLL申明 [StructLayout(LayoutKind.Sequential)] public struct MARGINS { public int Left; public int Right; public int Top; public int Bottom; } //DLL申明 [DllImport("dwmapi.dll", PreserveSig = false)] static extern void DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS margins); //DLL申明 [DllImport("dwmapi.dll", PreserveSig = false)] static extern bool DwmIsCompositionEnabled(); //直接添加代码 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); } //直接添加代码 protected override void OnPaintBackground(PaintEventArgs e) { base.OnPaintBackground(e); if (DwmIsCompositionEnabled()) { e.Graphics.Clear(Color.Black); } } public Form1() { InitializeComponent(); } } }
这中效果的实现主要是调用了系统的dwmapi.dll。
dwmapi.dll是Microsoft Desktop Window Manager API(桌面窗口管理器DWM 的公用界面)的动态链接库,正常文件,主要用作桌面效果的api。
DWM 是一种新界面,在除 Windows Vista Home Basic 之外的所有 Windows Vista 版本中均提供 DWM 界面。所以这种效果只能在Vista之后的系统中使用。