| Handles Clause (VB.Net) | 
| Handlying Events | 
| Hard Disabling - Add-ins | 
| Hash Codes | 
| Hash Generation - Strings | 
| Hash Sets | 
| Hash Tables | 
| HashSet - System.Collections.Generic. | 
| HashSet<T> | 
| Hashtable - System.Collections | 
| HashTable - System.Collections. | 
| HashTable.Synchronized | 
| HasVSTOObject Method | 
| Heap | 
| Heap Memory | 
| Helper Methods | 
| Hexadecimal Format Specifier (X or x) | 
| Hexadecimal Strings | 
| Hidden File Attributes | 
| Hide Advanced Elements - Intellisense | 
| Hiding Base Class Members | 
| Hit Count - Breakpoint | 
| HitTestInfo | 
| Hives - Registry | 
| Horizontal Scrollbar - Text Editor | 
| Host Controls | 
| Host Controls - Chart | 
| Host Controls - ListObject | 
| Host Controls - NamedRange | 
| Host Controls - OLEObject | 
| Host Controls - XMLMappedRange | 
| Host Controls Excel | 
| Host Controls Word | 
| Host Items | 
| Host Items - Cached | 
| Host Items - InnerObject | 
| Host Items - State | 
| Host Items Excel | 
| Host Items Word | 
| HostFileChangeMonitor - Runtime.Caching. | 
| HScrollBar - System.Windows.Forms. | 
| HTML Serialization | 
| Http Calls | 
| Http Debugging Proxy Tool - Fiddler | 
| HttpClient - System.Net.Http. | 
| HttpRuntime - System.Web | 
| HttpStatusCode - System.Net. | 
| HttpWebRequest - System.Net. | 
| HttpWebResponse - System.Net. | 
| Hwnd - Excel | 
| Hwnd - Outlook | 
| Hwnd - PowerPoint | 
| Hwnd - Word |