用 C# Winform 做出全透明的磨砂玻璃窗体

时间：2011-05-08 来源：yaob

就是一个简单的例子, 调用系统的 dwm 去重绘窗口. 只能在 Vista 和 7 之后才可以, 并且要确保已经开启主题服务等等, 总之不是非常实用, 好玩而已.

首先, 调用系统 API, 这里如果要引用神马的, 就不一一列出了, 大家自己引用一下.

[StructLayout(LayoutKind.Sequential)]
public struct MARGINS
{
    public int Left;
    public int Right;
    public int Top;
    public int Bottom;
}

[DllImport("dwmapi.dll", PreserveSig = false)]
public static extern void DwmExtendFrameIntoClientArea
    (IntPtr hwnd, ref MARGINS margins);

[DllImport("dwmapi.dll", PreserveSig = false)]
public static extern bool DwmIsCompositionEnabled();

然后重写两个事件:

protected override void OnLoad(EventArgs e)
{
    if (DwmIsCompositionEnabled())
    {
        MARGINS margin = new MARGINS();
        margin.Right = margin.Left = margin.Bottom = margin.Top = -1;
        DwmExtendFrameIntoClientArea(this.Handle, ref margin);
    }
    base.OnLoad(e);
}

protected override void OnPaintBackground(PaintEventArgs e)
{
    base.OnPaintBackground(e);
    if (DwmIsCompositionEnabled())
    {
        e.Graphics.Clear(Color.Black);
    }
}

最后.. 木有了, F5 运行吧~