The Insert | File I/O Command | File Dialog menu option inserts a command into the Edit window that brings up an Open dialog box during execution. This allows the operator to choose a file name at run time. It stores the name of the file chosen in the specified variable.
The syntax of this command in the Edit window is:
<varname> = File/Dialog,<expr>
Descriptions for some of the components of this command are:
<varname>
This is the name of the variable that is set to the name of the file
chosen by the user in the file dialog box.
<expr>
This is the text that appears on the title bar of the file dialog box.
To access the dialog box associated with this File I / O command:
Open the Edit window.
Place your cursor on the File Dialog command.
Press F9.
More: