How to Lock a Specific Field Once a Value Has Been Entered in Microsoft Access

In this Microsoft Access tutorial I will teach you how to lock a specific field once a value has been entered into it. We will use the On Current event and a little bit of VBA code.

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If Then: https://599cd.com/IfThen
Null: https://599cd.com/IsNull
On Current Event: https://599cd.com/OnCurrent

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