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Excel user defined functions unlimited

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30 Nov 200619 min read 222.8K   5.7K   77  
Describes how to return tables of values as the result of user defined functions (UDF) in Excel.
//---------------------------------------------------------------------------
//  Excel Multivalue Formula Add-In
//  Copyright (C) <2005> <Herbert Danler>
//  Contact: danler@users.sourceforge.net
//  Project Home Page: http://excelmvf.sourceforge.net/
//
//  This program is free software; you can redistribute it and/or modify it under
//  the terms of the GNU General Public License as published by the Free Software
//  Foundation; either version 2 of the License, or (at your option) any
//  later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
//  or FITNESS FOR A PARTICULAR PURPOSE.
//  See the GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License along with
//  this program; if not, write to the Free Software Foundation, Inc.,
//  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//---------------------------------------------------------------------------

/***********************************************************************
 * Module:  TRecord.h
 * Author:  Herbert Danler
 * Created: Freitag, 12. November 2004 11:12:27
 * Modified: Freitag, 12. November 2004 11:40:14
 * Purpose: Declaration of the class TRecord
 ***********************************************************************/

#if !defined(TRecord_h)
#define TRecord_h
#include <windows.h>

namespace excelmvf {

class TRecord
{
public:
   /* returns a TFieldDescriptor struct of field i. Fields are numbered in a sequence
    * purpose: to simplify implementation of < operator (which in turn is needed for sorting) */
   virtual VARIANT operator[](int pfieldnumber) const=0;
   VARIANT fieldAsVARIANT(int pindex);

protected:
private:
};

}


#endif

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