Hi,

When the user open the database, the database window will be hided. But, when the user close the database with one form opening, it will show the database window for a while, and then close it.

How to prevent the database window to show at the moment?

Sorry, that's just a Windows thing. Nothing you can do about it short of creating your own VB App.

However, you COULD TRY to set Echo False in the code that closes the form - it's doubtful that would do anything in this case, but you could try.