Sunday, August 12, 2007

Automatically Event Repeat in Excel VBA (OnTime Method)

VBA Code that can run at a fixed time can be done using the OnTime Method.

OnTime Method schedules a procedure to be run at a specified time in the future (either at a specific time of day or after a specific amount of time has passed).

expression.OnTime(EarliestTime, Procedure, LatestTime, Schedule)

expression Required. An expression that returns an Application object.

EarliestTime Required Variant. The time when you want this procedure to be run.

Procedure Required String. The name of the procedure to be run.

LatestTime Optional Variant. The latest time at which the procedure can be run. For example, if LatestTime is set to EarliestTime + 30 and Microsoft Excel is not in Ready, Copy, Cut, or Find mode at EarliestTime because another procedure is running, Microsoft Excel will wait 30 seconds for the first procedure to complete. If Microsoft Excel is not in Ready mode within 30 seconds, the procedure won’t be run. If this argument is omitted, Microsoft Excel will wait until the procedure can be run.

Schedule Optional Variant. True to schedule a new OnTime procedure. False to clear a previously set procedure. The default value is True.

Remarks

Use Now + TimeValue(time) to schedule something to be run when a specific amount of time (counting from now) has elapsed. Use TimeValue(time) to schedule something to be run a specific time.


Application.OnTime TimeValue("11:00:00"), "StartProc"
Application.OnTime TimeValue("13:00:00"), "EndProc"

Assuming that you have two procedures called StartProc and EndProc the procedures would ne executed at the specified time

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