Write it down, from now on you will never ever (i hope) need an API call to position a form on top of another exactly where you want.
You can take any pure VBA approach and won’t work. For any unknown reason forms boder's height are ignored!! form borders' size is: Yes you guessed! 817 twips or 14.410972222222mm this is 3.2 times the default size of controls (4.5mm).
This is the reason why for years we had been using API’s to exactly position a form. See it in action in my Tooltip control

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