# 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`(), DisableVAVG, EnableVAVG()`