How to Generate Events Automatically at Predefined Intervals (78599)
The information in this article applies to:
- Microsoft Visual Basic Standard Edition for Windows 2.0
- Microsoft Visual Basic Standard Edition for Windows 3.0
- Microsoft Visual Basic Professional Edition for Windows 2.0
- Microsoft Visual Basic Professional Edition for Windows 3.0
- Microsoft Visual Basic Standard Edition for Windows 1.0
This article was previously published under Q78599
Timer controls can be used to automatically generate an event at predefined
intervals. This interval is specified in milliseconds, and can range from 0
to 65535 inclusive.
Timer event processing will not be interrupted by new timer events. This is
because of the way that Windows notifies an application that a timer event
has occurred. Instead of interrupting the application, Windows places a
WM_TIMER message in its message queue. If there is already a WM_TIMER
message in the queue from the same timer, the new message will be
consolidated with the old one.
After the application has completed processing the current timer event, it
checks its message queue for any new messages. This queue may have new
WM_TIMER messages to process. There is no way to tell if any WM_TIMER
messages have been consolidated.
| Modification Type: | Major | Last Reviewed: | 12/12/2003 |
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| Keywords: | KB78599 |
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