Using Custom Colored Cursors in a C# Windows Application [closed]

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The Cursor class is rather poorly done. For some mysterious reason it uses a legacy COM interface (IPicture), that interface doesn’t support colored and animated cursors. It is fixable with some fairly ugly elbow grease:

using System;
using System.ComponentModel;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Reflection;

static class NativeMethods {
    public static Cursor LoadCustomCursor(string path) {
        IntPtr hCurs = LoadCursorFromFile(path);
        if (hCurs == IntPtr.Zero) throw new Win32Exception();
        var curs = new Cursor(hCurs);
        // Note: force the cursor to own the handle so it gets released properly
        var fi = typeof(Cursor).GetField("ownHandle", BindingFlags.NonPublic | BindingFlags.Instance);
        fi.SetValue(curs, true);
        return curs;
    }
    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    private static extern IntPtr LoadCursorFromFile(string path);
}

Sample usage:

this.Cursor = NativeMethods.LoadCustomCursor(@"c:\windows\cursors\aero_busy.ani");

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