You can use the following action statements with a drop-down list.
Action  | 
Description  | 
add  | 
Creates a drop-down list at runtime.  | 
add to  | 
Allows you to insert options in the list box at runtime.  | 
change text  | 
Changes the text displayed in the selection field.  | 
change window position  | 
Allows you to indicate which block of lines should be displayed. Note that you cannot use change window xposition [of] for list boxes.  | 
clear  | 
Clears the contents of both the list box and the selection field.  | 
disable  | 
Causes the drop-down list to be grayed and prevents the user from moving to or modifying the selection field or selecting from the list box.  | 
enable  | 
Causes the drop-down list to be drawn in normal color and allows the user to move and/or modify the selection field or select from the list box.  | 
make helpid  | 
Changes the help ID of the drop-down list.  | 
make parameter  | 
Change parameter string associated with the drop down list.  |