If your designer supports any toolbox features, you must include a toolbox item map in the class definition to enumerate the types of supported toolbox items. This map is a set of macros that define an array of TOOLBOXITEM structures, which contain information about the designer-specific toolbox items and the external controls that the designer supports.
The toolbox item map must begin with the BEGIN_TOOLBOXITEM_MAP macro and end with the END_TOOLBOXITEM_MAP. In between, use as many INTERNALTOOLBOXITEM and CONTROLTOOLBOXITEM macros as you need to enumerate the internal toolbox items and ActiveX controls your designer supports. See Toolbox Item Macros for details.
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