HandleCallback procedure (end (quotes) procedure) Web Service method call back 2nd handlers searching for throwing exceptions Handles clause sender parameter Handles clause (Click event) HandleSort procedure (DataGrid control) handling mobile requests (MMIT) 2nd header class SOAP creating 2nd 3rd header controls creating 2nd 3rd 4th Header templates adding to Repeater control HeaderTemplate element (Repeater control) Help Visual Studio .NET Contents window Dynamic Help window 2nd Index window Search window 2nd Hexadecimal Display tool (Visual Studio.NET Debug toolbar) hidden input fields state management hierarchical syntax .NET Framework namespaces hierarchy Exception hierarchy 2nd hit counts specifying in Breakpoints window (Visual Studio.NET) hooking up data Repeater control 2nd 3rd hooking up data (DataGrid control) CategoryLoad procedure 2nd modifying Page Load procedure 2nd HTML (Hypertext Markup Language) 2nd creating Web applications 2nd elements bulleted lists combo and list boxes hyperlinks images 2nd input types 2nd line breaks numbered lists tables versus XML 2nd HTML controls ASP.NET Web Forms 2nd 3rd Hungarian notation (variable-naming scheme) 2nd hyperlink columns adding (editing data with DataGrid control) 2nd 3rd Hyperlink control HyperLink control setting properties hyperlinks adding to Repeater control 2nd Hypertext Markup Language. [See HTML]2nd [See HTML] hypProductDetails DataBindings dialog box