This Post Details Content That I Have Written Regarding The SharePoint API On MSDN. The Full Article Will Have These Contents As Annotations Of The Full Article.
I Encourage You To Read The Full MSDN Class Documentation, Since Things Like Type Hierarchy Are Illustrated.
Adam Buenz – WSS MVP – Community Content From Annotations edited by Adam Buenz – MVP:
Description The Microsoft.SharePoint.WebControls.AttachmentUpload class inherits from the Microsoft.SharePoint.WebControls.FormComponent class which is the foundational control for form and field rendering controls. The AttachmentUpload control is visible in the shipped software when attachments are enabled on a list, located on the default list toolbar. The AttachmentUpload control checks whether the SPList.EnableAttachments property is true, determining whether the control should be visib
Read My Complete MSDN Article: AttachmentUpload