如何使用P / Invoke SendMessage设置边距？

using System;
using System.Runtime.InteropServices;

public class Win32API
{
    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    public static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
}

public class MainClass
{
    public static void Main(string[] args)
    {
        IntPtr hWnd = GetConsoleWindow();
        uint EC_LEFTMARGIN = 0x0001;
        uint EC_RIGHTMARGIN = 0x0002;
        uint EC_TOPMARGIN = 0x0004;
        uint EC_BOTTOMMARGIN = 0x0008;

        int leftMargin = 5;
        int rightMargin = 5;
        int topMargin = 5;
        int bottomMargin = 5;

        Win32API.SendMessage(hWnd, EC_LEFTMARGIN, (IntPtr)leftMargin, IntPtr.Zero);
        Win32API.SendMessage(hWnd, EC_RIGHTMARGIN, (IntPtr)rightMargin, IntPtr.Zero);
        Win32API.SendMessage(hWnd, EC_TOPMARGIN, (IntPtr)topMargin, IntPtr.Zero);
        Win32API.SendMessage(hWnd, EC_BOTTOMMARGIN, (IntPtr)bottomMargin, IntPtr.Zero);
    }
}