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The structure of the Windows Mobile registry is similar to the registries in other versions of Windows. The registry is a tree structure. Each node is composed of branches called keys, and each key can contain subkeys and entries. Entries are stored as name-value pairs. At the base of each node is the root, which is identified using a well-known constant value, or HKEY.
Traditionally, applications store data using the following key structure:
[ROOT]\Software\[Company name]\[Product name]
For example, Microsoft stores configuration information for the game FreeCell in the HKEY_LOCAL_MACHINE\Software\Microsoft\FreeCell registry key.