Identifies the module name and resourdeID for a 16 x 16 bitmap to use for the face of a toolbar or toolbox button.
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
\ToolBoxBitmap32 = <filename>.<ext>, resourceID
The standard Windows icon size is too large to be used for this purpose. This specifically supports control containers that have a design mode in which one selects controls and places them on a form being designed. For example, in Visual Basic, the control's icon is displayed in the Visual Basic Toolbox during design mode.