c# - 如何在 C# Winforms 中绘制 Windows 窗体的边框？

Question

如何将我们的 Winforms 显示为 MetroUI .. 不使用 3rd 方 dll ......我的意思是如何绘制表单的边框

      [Form1_______________-|[]|X] <- I Can able to change the color of this part
     |                          |
     |                          |<- I cant change the color of this part
    -|                          |
    ||__________________________|
    |          |-> I cant change the color of this part
    V
    I cant change the color of this part

---

我没有这个..但是它给出了静态颜色我想改变颜色...所以请给我一些想法

  public Form1()
    {
        InitializeComponent();
        Region = System.Drawing.Region.FromHrgn(CreateRoundRectRgn(0, 0, Width, Height, 0, 0));


    }
    [DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
    private static extern IntPtr CreateRoundRectRgn
    (
        int nLeftRect, // x-coordinate of upper-left corner
        int nTopRect, // y-coordinate of upper-left corner
        int nRightRect, // x-coordinate of lower-right corner
        int nBottomRect, // y-coordinate of lower-right corner
        int nWidthEllipse, // height of ellipse
        int nHeightEllipse // width of ellipse
     );