Send Cursor Back To Textbox After Invalid Entry

I have this code that triggers a textbox (empl_surname) AfterUpdate procedure.

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When the user enters an invalid value, how do I send the cursor back to the textbox without having thye user click on it? I thought that was what SetFocus would do.

I changed from AfterUpdate to Exit and used the Cancel feature. This seems to work for my purposes now.

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