An MMC console window has two panes. The left pane (the scope pane) shows a tree view of the namespace, which is the hierarchy of all the item that can currently be managed by MMC. Each item (called a node) is one of a variety of objects, tasks or containers that serve as management tools.
You administer the network by taking action on the contents of the result pane (the right pane) or by using commands in toolbars or command menus.
Command menus and bands on the Rebar (the lowest bar above the scope and result panes) adjust automatically to correspond to the node selected.
You can create multiple windows within the MMC. Each window can have a different view of the current namespace. The console always has one current master namespace, each child window may just provide a different view of that master namespace. Multiple windows enable you to view and switch to multiple parts of the console interface at once.
MMC Interface Server Providers