Parse phone fields

This works by changing the value to a formatted phone number.

I'm sure there could be some code improvements here, and would appreciate any suggestions anyone might have.

//Definition
void AFXAPI DDX_Phone(CDataExchange* pDX, int nIDC, CString& value);

//Implementation
void AFXAPI DDX_Phone(CDataExchange* pDX, int nIDC, CString& value)
{
      HWND hWndCtrl = pDX->PrepareEditCtrl(nIDC);
      if (pDX->m_bSaveAndValidate)
      {
            int nLen = ::GetWindowTextLength(hWndCtrl);
            ::GetWindowText(hWndCtrl, value.GetBufferSetLength(nLen),nLen+1);
            value.ReleaseBuffer();

      }
      else
      {
            CString newValue;
            for(int x=0; x < value.GetLength();x++)
            {
                  if(value[x] != '(' &&
                        value[x] != ')' &&
                        value[x] != '-' &&
                        value[x] != ' ' &&
                        value[x] != '.')

                        newValue += value[x];

            }
            if(newValue.GetLength()==7)
				newValue.Format("%s-%s",newValue.Left(3),newValue.Right(4));
            else if(newValue.GetLength()==10)
                newValue.Format("(%s)%s-%s",newValue.Left(3),newValue.Mid(3,3),newValue.Right(4));
            else if(newValue.GetLength()>10)
                newValue.Format("(%s) %s-%s%s",newValue.Left(3),newValue.Mid(3,3),newValue.Mid(6,4),newValue.Right(newValue.GetLength()-10));
            else
                newValue = value;

            AfxSetWindowText(hWndCtrl, newValue);
      }
}