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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:  TOrderItemDataset.h
 * Author:  Herbert Danler
 * Created: Freitag, 14. Mai 2004 09:56:18
 * Modified: Montag, 8. November 2004 15:13:19
 * Purpose: Declaration of the class TOrderItemDataset
 * Comment: A TOrderItemDataset instance contains all orderItems of a certain period of time. Data is returned as a VARIANT containing a two dimensional array of VARIANTs.
 *    The class also provides sorting 
 ***********************************************************************/

#if !defined(TOrderItemDataset_h)
#define TOrderItemDataset_h

class TOrderItemRecord;
class TSgADOQuery;

#include "TDataset.h"
#include "TRangeSize.h"

#include <vector>
#include <set>
#include <string>
#include <algorithm>
#include <limits.h>
#include "excelmvf.h"
#include "TFieldDescriptor.h"
#include "TSortingCriteria.h"
#include "stringhelper.h"


class TOrderItemDataset : public excelmvf::TDataset<TOrderItemRecord>
{
public:

   int retrieve(void);
   TOrderItemDataset(Variant pstartdate, Variant penddate, std::string psortcriterias);
   ~TOrderItemDataset();
   
   void setStartDate(Variant newStartDate);
   void setEndDate(Variant newEndDate);
   bool operator<(const excelmvf::TDataset<TOrderItemRecord>& pmvrecordset) const;

protected:
private:

   Variant startDate;
   Variant endDate;
   static std::string SQL;
   
};


#endif

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