# DrawScreenCels

Draws a list of cels (one or more) to the bitmaps of a screen.

### Synopsis

`Err DrawScreenCels (Item screenItem,CCB *ccb)`

### Description

DrawScreenCels traverses the list of bitmaps associated with the screen specified by the screenItem argument, calling `DrawCels()` for each bitmap. When this call returns, all cels are rendered into all bitmaps of the screen.

### Arguments

screenItem
  Item number of a screen structure.

ccb
  Pointer to the first of one or more CCB structures.

### 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. It became an SWI in Graphics folio V24.

### Associated Files

graphics.h, graphics.lib

### Notes

`DrawScreenCels()` operates faster when the task or thread calling it owns bitmap, as opposed to simply calling `OpenItem()` on the bitmap.

### See Also

``DrawCels`()`