Use the REFF command to run External Form Files.
filename.rff
Specifies the name of the external form file to launch.
Specifies a modeless form, allowing users to access other windows without closing the form first. This option is used in R:BASE for Windows only.
AS alias
This option is used in R:BASE for Windows only. Allows the user to specify a name for this instance of the form. This option is used in conjunction with the MDI option so that the user can specify the form with the SETFOCUS command.
CAPTION 'windowcaption'
This option is used in R:BASE for Windows only. Specifies a caption for the window title bar.
Examples
REFF RRBYW20.RFF CAPTION 'Running R:BASE Your Way!'
REFF AdhocReports.RFF MDI AS Adhoc CAPTION 'Adhoc Custom Reports'