game4tress 0 Newbie Poster

I'm creating a new functionality for an already existing software, made with VB .Net. This new functionality consists of rendering 3D objects on a specific form, and be able to move/rotate/resize/change,... those objects.
For this task i've used XNA.
I've created a new XNA Windows project and, in the specific form, i've placed a panel. When the form is instanciated i give the Panel1 handle to the XNA project which i use to create the GraphicsDeviceManager.
Everything is working well, except for a window that is shown every time i call the VB .Net form. This windows has the VB .Net project name on its caption. If i try to minimize this new window, the objects stop rendering on the Panel.
Why does this windows appears?
How can i Close it, or hide it?