prompt—String expression that is displayed as the message in the dialog box (maximum length determined by character width; approximate maximum of 1024 characters; lines of messages with multiple lines separated by carriage returns (Chr(13)), linefeeds (Chr(10)), or combinations of carriage returns and linefeeds)
buttons—Numeric expression that specifies the number and type of buttons to be displayed, the icon style to be used, the identity of the default button, and the modality of the message box (If buttons is omitted, the buttons value is 0). Refer to Microsoft MSDN information for more details about this feature.
title—String expression that is displayed in the title bar of the dialog box (If title is omitted, the application name is placed in the title bar.)
helpfile (not available on 16-bit platforms)—String expression that identifies the help file that provides context-sensitive help for the dialog box (If helpfile is provided, context must be provided.)
context (not available on 16-bit platforms)—Numeric expression that identifies the help context number assigned by the help author to the relevant help topic (If context is provided, helpfile must be provided.)