gistfile1.txt

internal class HotkeyConverter : KeysConverter
{
    public override object ConvertTo(ITypeDescriptorContext context,  CultureInfo culture, object value, Type destination
    {
        if (destinationType == typeof(Keys)) 
        {
            Hotkey hotkey = (Hotkey) value;

            if (hotkey != null) 
            {
               Keys keys = Keys.None;
               if (hotkey.Modifier.HasFlag(Modifiers.Alt)) keys |= Keys.Alt;
               if (hotkey.Modifier.HasFlag(Modifiers.Control)) keys |= Keys.Control;
               if (hotkey.Modifier.HasFlag(Modifiers.Shift)) keys |= Keys.Shift;
               keys |= hotkey.Key;
               return keys;
            }
        }

        return base.ConvertTo(context, culture, value, destinationType);
    }

    public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
    {
        // this is the code that handles the Property Grid shit.
        if (value is string) 
        {
            value = base.ConvertFrom(context, culture, value);
        }

        // this is code that the Property Grid editor uses and the Hotkey TextBox.
        if (value.GetType() == typeof (Keys)) 
        {
            Keys keys = (Keys)value;
            Modifiers mods = Modifiers.None;
            if (keys.HasFlag(Keys.Alt)) mods |= Modifiers.Alt;
            if (keys.HasFlag(Keys.Control)) mods |= Modifiers.Control;
            if (keys.HasFlag(Keys.Shift)) mods |= Modifiers.Shift;
            Keys nonMods = ExtractNonMods(keys);
            return new Hotkey(mods, nonMods);
        }

        return base.ConvertFrom(context, culture, value);
    }

    private static Keys ExtractNonMods(Keys keys)
    {
        return (Keys)((int)keys & 0x0000FFFF);
    }
}