Displays the standard Visual Basic controls plus any ActiveX controls and insertable objects you have added to your project. You can:
Display ToolTips for the Toolbox buttons by selecting the Show ToolTips option in the General tab of the Options dialog box.
Customize the Toolbox by adding tabs to it.
When you add a tab, a Pointer is always available on it.
Customize the General tab or a custom tab by adding controls using the Components command from the Project menu.

The toolbox contains the bits & pieces to bulid your application interface
Places the control or embedded component in the toolbox and adds a control reference to the project.