C / C++ / MFC

COPYDATASTRUCT * p;<br />
p = (COPYDATASTRUCT*) lParam;

1	CString m_text;
2	m_Number1.GetWindowText(m_text.GetBuffer(1024),1024);
3	m_text.ReleaseBuffer(-1);
4
5	int a,b; 
6	m_Number1.GetSel(a,b);
7	
8	char new_char;
9	if (m_text.GetLength() > 0) {
10		new_char=m_text.GetAt(a-1);
11		if ( ((new_char < '0') || (new_char > '9')) && (new_char != '+') ) {
12			CString s;
13			s=m_text.Left(a-1);
14			m_Number1.SetWindowText("hello does this work?");
15			m_Number1.SetSel(1,1,FALSE);
16		}
17	}

void CMyEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
    if ( (nChar >= '0' && nChar <= '9') || nChar == '+' || nChar == '\010' )
        CEdit::OnChar(nChar, nRepCnt, nFlags);
}

#if !defined(AFX_NUMTLFEDIT_H__4ECA6D61_8551_11D2_8DC1_0000E2140DA0__INCLUDED_)
#define AFX_NUMTLFEDIT_H__4ECA6D61_8551_11D2_8DC1_0000E2140DA0__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
// NumTlfEdit.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CNumTlfEdit window

class CNumTlfEdit : public CEdit
{
// Construction
public:
	CNumTlfEdit(BOOL modo_lista=FALSE);

// Attributes
public:

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CNumTlfEdit)
	//}}AFX_VIRTUAL

// Implementation
public:
	BOOL numero_valido(void);
	virtual ~CNumTlfEdit();

	// Generated message map functions
protected:
	//{{AFX_MSG(CNumTlfEdit)
	afx_msg void OnUpdate();
	//}}AFX_MSG

	DECLARE_MESSAGE_MAP()
    BOOL modo_lista;
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Developer Studio will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_NUMTLFEDIT_H__4ECA6D61_8551_11D2_8DC1_0000E2140DA0__INCLUDED_)

// NumTlfEdit.cpp : implementation file
//

#include "stdafx.h"
#include "NumTlfEdit.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CNumTlfEdit

CNumTlfEdit::CNumTlfEdit(BOOL modo_lista)
    : modo_lista(modo_lista)
{
}

CNumTlfEdit::~CNumTlfEdit()
{
}


BEGIN_MESSAGE_MAP(CNumTlfEdit, CEdit)
	//{{AFX_MSG_MAP(CNumTlfEdit)
	ON_CONTROL_REFLECT(EN_UPDATE, OnUpdate)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CNumTlfEdit message handlers

#define ES_NUMERO(ch) ((ch)>=TCHAR('0')&&(ch)<=TCHAR('9'))

void CNumTlfEdit::OnUpdate() 
{
    CString str,str_formateada;
    BOOL    hubo_fallos=0;
    BOOL    signo_mas=FALSE;
    BOOL    dentro_parentesis=FALSE;
    BOOL    ultimo_numero=FALSE;
    BOOL    hubo_numero=FALSE;
    int     comienzo_sel,fin_sel;

    GetWindowText(str);
    GetSel(comienzo_sel,fin_sel);

    for(int i=0;i<str.GetLength();i++){
      if(str[i]==TCHAR(' ')){
      }

      else if(ES_NUMERO(str[i])){
        signo_mas=TRUE;
        ultimo_numero=TRUE;
        hubo_numero=TRUE;
      }

      else if(str[i]==TCHAR('+')){
        if(signo_mas){
          hubo_fallos=TRUE;
          if(i<comienzo_sel){
            comienzo_sel--;
            fin_sel--;
          }
          continue;
        }
        else{
          signo_mas=TRUE;
          ultimo_numero=FALSE;
        }
      }

      else if(str[i]==TCHAR('-')||str[i]==TCHAR('.')){
        if(!ultimo_numero){
          hubo_fallos=TRUE;
          if(i<comienzo_sel){
            comienzo_sel--;
            fin_sel--;
          }
          continue;
        }
        else{
          signo_mas=TRUE;
          ultimo_numero=FALSE;
        }
      }

      else if(str[i]==TCHAR('(')){
        if(dentro_parentesis){
          hubo_fallos=TRUE;
          if(i<comienzo_sel){
            comienzo_sel--;
            fin_sel--;
          }
          continue;
        }
        else{
          dentro_parentesis=TRUE;
          signo_mas=TRUE;
          ultimo_numero=FALSE;
        }
      }

      else if(str[i]==TCHAR(')')){
        if(!dentro_parentesis){
          hubo_fallos=TRUE;
          if(i<comienzo_sel){
            comienzo_sel--;
            fin_sel--;
          }
          continue;
        }
        else{
          dentro_parentesis=FALSE;
          signo_mas=TRUE;
          ultimo_numero=FALSE;
        }
      }

      else if(modo_lista&&(str[i]==TCHAR(',')||str[i]==TCHAR(';'))){
        if(dentro_parentesis||!hubo_numero){
          hubo_fallos=TRUE;
          if(i<comienzo_sel){
            comienzo_sel--;
            fin_sel--;
          }
          continue;
        }
        else{
          signo_mas=FALSE;
          dentro_parentesis=FALSE;
          ultimo_numero=FALSE;
          hubo_numero=FALSE;
        }
      }

      else{
        hubo_fallos=TRUE;
        if(i<comienzo_sel){
          comienzo_sel--;
          fin_sel--;
        }
        continue;
      }

      str_formateada+=str[i];
    }

    if(hubo_fallos){
      MessageBeep(MB_ICONEXCLAMATION);
      SetWindowText(str_formateada);
      SetSel(comienzo_sel,fin_sel);
    }
}

BOOL CNumTlfEdit::numero_valido()
{
  CString str;
  BOOL    hay_numeros=FALSE;

  GetWindowText(str);
  
  for(int i=0;i<str.GetLength();i++){
    if(ES_NUMERO(str[i])){
      hay_numeros=TRUE;
      break;
    }
  }

  return hay_numeros;
}