Allows Menu Item's to have icons.

MenuItemBitmap.cs

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Drawing;

namespace SuperGrate
{
    static class MenuItemBitmap
    {
        [DllImport("user32.dll")]
        private static extern int SetMenuItemBitmaps(IntPtr hMenu, IntPtr nPosition, int wFlags, IntPtr hBitmapUnchecked, IntPtr hBitmapChecked);
        public static void SetBitmap(this MenuItem MenuItem, Bitmap Bitmap, Bitmap UncheckedBitmap = null)
        {
            if(UncheckedBitmap == null)
            {
                SetMenuItemBitmaps(MenuItem.Parent.Handle, (IntPtr)MenuItem.Index, 0x00000400, Bitmap.GetHbitmap(), Bitmap.GetHbitmap());
            }
            else
            {
                SetMenuItemBitmaps(MenuItem.Parent.Handle, (IntPtr)MenuItem.Index, 0x00000400, Bitmap.GetHbitmap(), UncheckedBitmap.GetHbitmap());
            }
        }
    }
}