Each ActiveX control inserted on a worksheet has a list of properties that
can be viewed in the 'Properties' window. Where do we go to get help on
what each of these properties can do or control?

Some properties are self-evident, but others are not so self-explanatory.
For example, in the case of a Check Box control, there are properties such
as Accelerator, Autoload, GroupName, and Placement, whose purpose or
function is not so apparent.

Thank you for any help finding a resource for this issue.