XL2000: Canceling OnTime Macro When Time Argument Is Volatile (213452)

WORKAROUND

To cancel an OnTime method, you must call another OnTime method to set the schedule argument equal to False. However, note that this method does not work if the time argument in the OnTime method is set with the NOW function.

To prepare the first OnTime method so that you can cancel it later, create a time variable and use this variable in both cases, as in the following example:

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1. Type or paste the following macro code into a module sheet in a new workbook:

   Dim TimeNow As Double
   Dim TimeStop As Double
   Dim TimeSet As Double
   
   Sub RunMeFirst()
      TimeNow = Now
      TimeStop = TimeNow + TimeValue("00:00:59") 'this sets the time at
                                                 'which all macros will
                                                 'stop
      TimeSet = TimeNow + TimeValue("00:00:15")
      Set_OnTime
   End Sub
   
   Sub Set_OnTime()
     Application.OnTime TimeSet, "TestMacro"
   
      If TimeSet > TimeStop Then  'compare the time to stop with the time
                                  'at which the TestMacro is scheduled to
                                  'run
        Application.OnTime TimeSet, "TestMacro", , False
      End If
   End Sub
   
   Sub TestMacro()
      ActiveCell.Value = 1
      ActiveCell.Offset(1, 0).Select
      TimeSet = TimeSet + TimeValue("00:00:15")
      Set_OnTime
   End Sub
   					

2. Activate Sheet1 in your workbook.
3. Run the RunMeFirst macro.

The TimeStop variable is set to 59 seconds after you run the RunMeFirst macro, and the TimeSet variable is set to 15 seconds after you run the RunMeFirst macro. Then, the Set_OnTime macro is called, which in-turn checks to see if the TimeSet variable is greater than the TimeStop variable. If it is, all macros stop. If it is not, the TestMacro is called. The TestMacro places a value of 1 in the active cell, selects the next cell down from the active cell, and then resets the TimeSet variable to 15 seconds past its current value. The TestMacro then calls the Set_OnTime macro.