Convert Pen to IntPtr

Question

Is there a simple way to convert a System.Drawing.Pen into its unmanaged counterpart? Like, if you had a Pen like this:

Pen p = new Pen(Color.Blue, 1f);
IntPtr ptr = p.ToPtr();

I know this code doesn't work, but is there a way to do it similarly?

Answer 1

The Penclass has an internal property NativePen which contains exactly what you want. You can access this property through reflection (if your code has the appropriate permissions) using:

Pen p = new Pen(Color.Blue, 1f);
PropertyInfo pi = typeof(Pen).GetProperty("NativePen", BindingFlags.Instance | BindingFlags.NonPublic);
IntPtr ip = (IntPtr)pi.GetValue(p, null);

Be aware that theoretically this might not work in future versions of the .NET-Framework, since internal properties could change ...