====== CreateVBLIOReq ======

Returns an I/O request for use with WaitVBL() and WaitVBLDefer().

==== Synopsis ====

''%%Item CreateVBLIOReq (void)%%''

==== Description ====

This call is a convenience call for the vbl timer. This call creates and returns an I/O request that is suitable for use with ''%%WaitVBL()%%'' and ''%%WaitVBLDefer()%%''.

==== Return Value ====

''%%CreateVBLIOReq()%%'' returns the item number of the I/O request or an error code (a negative value) if an error occurs.

==== Implementation ====

Macro implemented in graphics.h V24.

==== Associated Files ====

graphics.h

==== See Also ====

''%%DeleteVBLIOReq%%''()