====== EnableHAVG ======

Enables horizontal averaging.

==== Synopsis ====

''%%Err EnableHAVG (Item screenItem)%%''

==== Description ====

This call enables horizontal averaging of the specified screen. Vertical averaging is left undisturbed.

==== Arguments ====

  * **screenItem** Item number of the screen whose display is to be modified.

==== Return Value ====

The call returns 0 if successful or an error code (a negative value) if an error occurs.

==== Implementation ====

Folio call implemented in Graphics folio V20.

==== Associated Files ====

graphics.h, graphics.lib

==== See Also ====

''%%DisableHAVG%%''(), [[:documentation:development:opera:pf25:ppgfldr:ggsfldr:gprfldr:01gpr017#xref29615|DisableVAVG]], [[:documentation:development:opera:pf25:ppgfldr:ggsfldr:gprfldr:01gpr027#xref35234|EnableVAVG]]()