Remote Registry Access in 64-bit Windows
The registry redirector provides remote access to the registry on 64-bit Windows through the RegConnectRegistry function.
If the client is a 32-bit application, it accesses the server's default 32-bit registry view. If the client is a 64-bit application, it accesses the 64-bit registry view.
Windows Server 2003: All clients access the 64-bit registry view unless the application uses the KEY_WOW64_32KEY flag. This behavior changed with Windows Server 2003 with Service Pack 1 (SP1) and Windows XP Professional x64 Edition, provided that both the client and the server are running these versions of Windows.
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