Modify CDlgGridDlg's Declaration

In this step, the application's main dialog class is modified to include member variable of our derived grid class.

1. Open DlgGridDlg.h.

2. Add the following two lines to the public section of the CDlgGridDlg class declaration:

// Grid window

CMyGridWnd m_wndGrid;

3. Save and close DlgGridDlg.h