C / C++ / MFC

void wordWrap (CString strText, int nWrap, CStringArray &lines)
{
    int count = 0;
    TCHAR *ptr = strText.GetBuffer(strText.GetLength() + 1);
    TCHAR *EndofLine = ptr;
    TCHAR *StartofLine = ptr;
 
    // traverse string
    while (*ptr)
    {
        // traverse word
        while (*ptr && !_istspace(*ptr))
        {
            ptr = _tcsinc(ptr);
            ++count;
        }
 
        // mark end of line
        if (count <= nWrap)
            EndofLine = ptr;
 
        // add line to array
        if (!*ptr || count > nWrap)
        {
            ptr = EndofLine;
            TCHAR temp = *ptr;
            *ptr = 0;
            lines.Add(StartofLine);
            *ptr = temp;
            StartofLine = _tcsinc(ptr);
            count = -1;
        }
 
        // continue?
        if (*ptr)
        {
            ptr = _tcsinc(ptr);
            ++count;
        }
    }
    strText.ReleaseBuffer();
}

//! Wraps a string at a user specified boundary and and stores
//! each individual line in a CStringArray.
//! @param  strString   The string to be wrapped.
//! @param  nWrap       Wrap margin.
//! @param  lines       Collection of wrapped lines.
void wrap
  (CString strString,
   int nWrap,
   CStringArray& lines)
{
  int nStart = 0;
  int nEnd = 0;
  do {
 
    // Determine boundaries of next line
    nEnd = nStart + nWrap;
    if (nEnd >= strString.GetLength())
       nEnd = strString.GetLength() - 1;
 
    // If we're not at the end of the string, make sure we're
    // at a word break
    if (nEnd != strString.GetLength() - 1)
       while ((nEnd >= 0) && (strString.GetAt (nEnd) != _T(' ')))
             nEnd--;
 
    // Extract the next line
    CString strNextLine;
    if ((nEnd - nStart) > 0) {
       strNextLine = strString.Mid (nStart, (nEnd - nStart) + 1);
       lines.Add (strNextLine);
    }
 
    // Set the start of the next boundary
    nStart = nEnd + 1;
 
  } while (nStart < strString.GetLength());
  return;
}

//! Repopulates the list control.
void repopulateListCtrl()

DialogOne* m_pDialogOne = ptr to a DialogOne instance;
ASSERT (m_pDialogOne != NULL);
ASSERT (m_pDialogOne->GetSafeHwnd() != NULL);
ASSERT (::IsWindow (m_pDialogOne->GetSafeHwnd());
m_pDialogOne->repopulateListCtrl();