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()