End Google Ads 201810 - BS.net 01 --> Hello

Env: Win7 64bits VS2010 Sp1Rel

When I maximized my MFC application, I'm unable to auto-unhide the taskbar. Sometimes, it flashes half a second and then stay hidden.

It's not a question of taskbar configuration. If I restore my app and maximize an other application (say Windows Explorer or Opera or any other ones ...), the taskbar auto-unhides correctly ...

Any clues why I got this strange behaviour ? Thanks for your Help

Thierry