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Asked: 2026-05-13T23:58:36+00:00

Is there a simple way to convert a System.Drawing.Pen into its unmanaged counterpart? Like,

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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?

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1 Answer

  1. Editorial Team

    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 …

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