first doc it to say right hand side by pulling the dialog title bar (here the blue bar that says Solution Explorer), click and hold and drag to one side where there will be an arrow like image will appear once you do this. Or double click on the title bar.
After it is docked, there will minimize like little trangle, a push-pin next to it and x to close window. When the pushpin is pointing side ways, it is stuck "open", when the pin points down it is auto-hide. To toggle the the modes, click on the pin.
Please close the thread if this is what you needed.