Sets a screen to display a specific VDL.
Err SetVDL (Item screenItem,Item vdlItem)
This call associates the VDL specified by the vdlItem argument with the screen specified by the screenItem argument.
Every screen has an associated VDL. After SetVDL()
, when DisplayScreen()
is called referring to the specified screen the new VDL is used to create the display.
This call returns the item number of the current VDL (the last one submitted) or an error code (a negative value) if an error occurs.
Folio call implemented in Graphics folio V20.
graphics.h, graphics.lib