If helpfile is provided, context must also be provided. Not available on 16-bit platforms. If context is provided, helpfile must also be provided. Not available on 16-bit platforms. Yes , No , and Cancel buttons.
First button is default.
When adding numbers to create a final value for the argument buttons , use only one number from each group. When both helpfile and context are provided, the user can press F1 to view the Help topic corresponding to the context. If the dialog box displays a Cancel button, pressing the ESC key has the same effect as clicking Cancel . If the dialog box contains a Help button, context-sensitive Help is provided for the dialog box. However, no value is returned until one of the other buttons is clicked.