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Activate_Virtual_Screen
Purpose Redirects all subsequent screen writing activity to a virtual
screen.
Decln. Activate_Virtual_Screen(Page:byte);
Remarks Page is the number of the virtual screen to activate. It must be
in the range 1 to Max_Screens and must have been created with
CreateScreen or SaveScreen.
Example
BEGIN
CREATESCREEN(3,25);
ACTIVATE_VIRTUAL_SCREEN(3);
CLEARTEXT(1,1,80,25,WHITE,BLUE);
WRITECENTER(1,YELLOW,BLUE,'HELP SYSTEM');
......
SLIDERESTORESCREEN(3,DOWN);
ACTIVATE_VISIBLE_SCREEN;
END;
Virtual screen number 3 is created and all screen writes are redirected to
it with the Activate_Virtual_Screen procedure. The virtual screen is
displayed to the user by sliding it down onto the display.
See Also:
CreateScreen
SaveScreen
Activate_Visible_Screen
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