Microsoft KB Archive/105977

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PRB: Setting OnEnter to TAB and OnExit to SHIFT+TAB Loops
'Article ID: Q105977

Creation Date: 28-OCT-1993

Revision Date: 01-DEC-1996' The information in this article applies to:


 * Microsoft Access versions 1.0, 1.1, 2.0, 7.0, 97

SYMPTOMS

Moderate: Requires basic macro, coding, and interoperability skills.

If you set the OnEnter property of text box on a form to run a macro that sends a TAB, and you set the OnExit property of the text box to run a macro that sends a SHIFT+TAB, an infinite loop occurs when you view the form in Form view.

CAUSE

When you view the form in Form view, the text box control's OnEnter property runs a macro that sends a TAB. The TAB triggers the control's OnExit property, which runs a macro that sends a SHIFT+TAB. The SHIFT+TAB triggers the OnEnter property again, and so on.

RESOLUTION

The macros are performing as they should. Press CTRL+BREAK to cause the macros to stop running.

MORE INFORMATION

Steps to Reproduce Behavior

  Create the following macros: Macro Name      Action -     Tab              SendKeys ShiftTab        SendKeys Tab Actions SendKeys Keystrokes: {tab} Wait: No      ShiftTab Actions -     SendKeys Keystrokes: +{tab} Wait: No  Create a new form. Add two text boxes to the form. Set the first text box's OnEnter property to Tab, and its OnExit property to ShiftTab. View the form in Form view. Note that an infinite loop occurs.
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KBCategory: kbusage

KBSubcategory: FmsEvnt

Additional reference words: 1.00 1.10 2.00 7.00 97 8.00 on enter exit