I have a custom task pane placed at the top of the Outlook. From what Microsoft says here in the remarks:
The minimum height depends on several factors, and can change in future releases of Microsoft Office. If you try to set the Height property to a value that is less than the minimum height, the application will automatically reassign the Height property to the minimum height.
What are these factors?
I would like to know what is the minimum height in advance so I can design my custom task pane with the UI components within it accordingly. Of course, if you put a smaller value Outlook will reassign the minimum height.