    deferred class
    	EV_CLIPBOARD_I

    General
    	cluster: implementation_mswin
    	description:
    		"Objects that allow access to the operating
    		system clipboard."

    Ancestors
    	EV_ANY_I*

    Queries
    	has_text: BOOLEAN
    	text: STRING_32

    Commands
    	set_text (a_text: STRING_GENERAL)

    Constraints
    	has text implies text not empty
    	not has text implies text empty