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CFilterEdit: Use Regular Expressions to Filter Your Input

, 3 Oct 2011
The definitive approach to filtering input text. Includes configurable error display.
#include "StdAfx.h"
#include "IntEdit.h"

namespace FilterEdit
bool CIntEdit::m_bInitialised = false;
CRegEx CIntEdit::m_RegEx;

CIntEdit::CIntEdit () :
	CBaseEdit (&m_RegEx)
	if (!m_bInitialised)
		CString strRegEx (_T("0|[-+]?[1-9][0-9]*"));

		m_RegEx.assign (strRegEx);
		m_bInitialised = true;

CIntEdit::~CIntEdit ()

int CIntEdit::GetValue () const
	CString strInt;

	GetWindowText (strInt);
	return _tstoi (strInt);

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About the Author

Ben Hanson
Software Developer (Senior)
United Kingdom United Kingdom
I started programming in 1983 using Sinclair BASIC, then moving on to Z80 machine code and assembler. In 1988 I programmed 68000 assembler on the ATARI ST and it was 1990 when I started my degree in Computing Systems where I learnt Pascal, C and C++ as well as various academic programming languages (ML, LISP etc.)
I have been developing commercial software for Windows using C++ for 15 years.

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