GetHeaderPart()

// NTTabPage member. Required for determining the tab header name
protected override string GetHeaderPart(string variable)
{
     // Determine the text for the tab header name
     switch (variable)
     {
         case "@INSTRUMENT": return Instrument == null ? Resource.GuiNewTab : Instrument.MasterInstrument.Name;
         case "@INSTRUMENT_FULL": return Instrument == null ? Resource.GuiNewTab : Instrument.FullName;
     }
     return variable;
}