TimerSignalAtTimeVBL 
 Sends a signal at the specified VBL.
Synopsis
TimerHandle TimerSignalAtTimeVBL (int32 signal, uint32 fields)
Description
Creates a timer that notifies you by signal at the specified VBL time. The timer is a one-shot; after sending a notification message the timer enters a suspended state. Use TimerReset() to reactivate the timer using new time values, or TimerCancel() to delete the timer. 
The TimerServices thread must be active before calling this function. 
Arguments
- signal
- Signal to send to your task. 
- fields
- VBL field count at which the event occurs. 
Return Value
A TimerHandle (a positive value) on success or a negative error code. 
Implementation
Library call implemented in lib3do.lib. 
Associated Files
lib3do.lib, timerutils.h
See Also
TimerSignalAfterDelayVBL, TimerSignalHeartbeatVBL