>>Just this TopLevel form application. The other applications I have are not in a top level form, and they do not have that same behaviour.
>
>Another workaround, alternative to Alan's suggestion, and one that doesn't require custom code, is to change .SelectOnEntry = .T.

Thank you Hilmar,

I found another workaround, Keeps the behaviour just as I expect it to be, without a worry of when a user enters the textbox highlighting some text with the mouse.
In the LostFocus Event, add the following line:

This.SelStart = 0

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