The following table identifies the size limits for the various registry elements. Registry Element Size Limit Key name 255 characters Value name 16,383 characters Windows 2000:  260 ANSI characters or 16,383 Unicode characters. Value Available memory (latest format) 1 MB (standard format) Tree A registry tree can be 512 levels deep. You can create up to 32 levels at a time through a single registry API call. Long values (more than 2,048 bytes) should be stored in a file, and the location of the file should be stored in the registry. This helps the registry perform efficiently. The file location […]

Starting with Windows Server 2003, Microsoft Distributed Transaction Coordinator (MS DTC) requires that you create registry values for all XA DLLs that you plan to use. This requirement was added to Windows Server 2003 to help you to minimize the risks that are associated with using third-party XA DLLs in the MS DTC process. To retain the same functionality when you use XA transactions, you must add a registry value in the XADLL key for each XA DLL that you plan to use. This article describes these registry values. For example, when you upgrade an existing system to Windows Server […]

Beginning with Windows 7, the DeviceOverrides registry key specifies that one or more removable device capability overrides exist in the system. For more information about the removable device capability, see Overview of the Removable Device Capability. The Plug and Play (PnP) manager uses a new ID (container IDs) to group one or more device nodes (devnodes) that originated from and belong to each instance of a particular physical device installed in the computer. For legacy devices, the PnP manager generates container IDs through the removable device capability. For more information about how the PnP manager generates container IDs, see How […]