说明：  The CXrNumericEdit class is derived from the normal CEdit class. To use this class Add the CXrNumericEdit source file to project. Add standard edit control Change CEdit class to CXrNumericEdit public: //Dialog Data //{{AFX_DATA(CNumericEditDlg) enum { IDD = IDD_NUMERICEDIT_DIALOG } CXrNumericEdit m_ctrlPositiveValue To get and set the value in the CXrNumericEdit control use the DDX functions. void CNumericEditDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX) //{{AFX_DATA_MAP(CNumericEditDlg) DDX_Text(pDX, IDC_POSITIVE_SAMPLE, m_dbPositiveValue) ... //}}AFX_DATA_MAP }