C# WinForm实现Win7 Aero磨砂效果

[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(); //Dll 导入 DwmApi
 
protected override void OnLoad(EventArgs e)
{
    //如果启用Aero
    if (DwmIsCompositionEnabled())
    {
        MARGINS m = new MARGINS();
        m.Right = -1; //设为负数,则全窗体透明
        DwmExtendFrameIntoClientArea(this.Handle, ref m); //开启全窗体透明效果
    }
    base.OnLoad(e);
}
 
protected override void OnPaintBackground(PaintEventArgs e)
{
    base.OnPaintBackground(e);
    if (DwmIsCompositionEnabled())
    {
        e.Graphics.Clear(Color.Black); //将窗体用黑色填充（Dwm 会把黑色视为透明区域）
    }
}