sf_cua_task_switch  Issues RUN SAVE and show "Switch" window
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    procedure sf_cua_task_switch prototype
      parameters const char the_task,;
                 const char the_switch,;
                 const logical show_switch,;
                 const logical overlay

    Simple RUN [SAVE]... in CUA

    Example:

    sf_cua_task_switch( "command", "Exit to DOS", .t., .t. )

    Overlay parameter issues RUN SAVE and show_switch decides if the CUA
    "Task Switching" window is displayed.