C / C++ / MFC

class CMyDlg : public CDialog
{
    CButton m_btnOK;
    CEdit   m_ebKey5;
    CEdit   m_ebKey4;
    CEdit   m_ebKey3;
    CEdit   m_ebKey2;
    CEdit   m_ebKey1;
	
    afx_msg void OnChangeEdit1();
    afx_msg void OnChangeEdit2();
    afx_msg void OnChangeEdit3();
    afx_msg void OnChangeEdit4();
    afx_msg void OnChangeEdit5();
 
    void EnableOKButton( void );
};
 
void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialog::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CMyDlg)
    DDX_Control(pDX, IDOK, m_btnOK);
    DDX_Control(pDX, IDC_EDIT5, m_ebKey5);
    DDX_Control(pDX, IDC_EDIT4, m_ebKey4);
    DDX_Control(pDX, IDC_EDIT3, m_ebKey3);
    DDX_Control(pDX, IDC_EDIT2, m_ebKey2);
    DDX_Control(pDX, IDC_EDIT1, m_ebKey1);
    //}}AFX_DATA_MAP
}
 
BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
    //{{AFX_MSG_MAP(CMyDlg)
    ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
    ON_EN_CHANGE(IDC_EDIT2, OnChangeEdit2)
    ON_EN_CHANGE(IDC_EDIT3, OnChangeEdit3)
    ON_EN_CHANGE(IDC_EDIT4, OnChangeEdit4)
    ON_EN_CHANGE(IDC_EDIT5, OnChangeEdit5)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()
 
BOOL CMyDlg::OnInitDialog()
{
    CDialog::OnInitDialog();
 
    m_ebKey1.SetLimitText(5);
    m_ebKey2.SetLimitText(5);
    m_ebKey3.SetLimitText(5);
    m_ebKey4.SetLimitText(5);
    m_ebKey5.SetLimitText(5);
 
    return TRUE;  // return TRUE  unless you set the focus to a control
}
 
void CMyDlg::OnChangeEdit1() 
{
    if (m_ebKey1.GetWindowTextLength() == 5)
        m_ebKey2.SetFocus();
 
    EnableOKButton();
}
...
void CMyDlg::OnChangeEdit4() 
{	
    if (m_ebKey4.GetWindowTextLength() == 5)
        m_ebKey5.SetFocus();
 
    EnableOKButton();
}
 
void CMyDlg::OnChangeEdit5() 
{
    // no SetFocus() required
 
    EnableOKButton();
}
 
void CMyDlg::EnableOKButton( void )
{
    bool    bEnable = true;
 
    bEnable &= (m_ebKey1.GetWindowTextLength() == 5);
    bEnable &= (m_ebKey2.GetWindowTextLength() == 5);
    bEnable &= (m_ebKey3.GetWindowTextLength() == 5);
    bEnable &= (m_ebKey4.GetWindowTextLength() == 5);
    bEnable &= (m_ebKey5.GetWindowTextLength() == 5);
 
    m_btnOK.EnableWindow(bEnable);
}

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown