Shell Registry Handling Functions

This section describes the Windows Shell registry handling functions. The programming elements explained in this documentation are exported by Shlwapi.dll and defined in Shlwapi.h and Shlwapi.lib.

In this section

Topic	Description
AssocCreate	Returns a pointer to an IQueryAssociations object.
AssocGetPerceivedType	Retrieves a file's perceived type based on its extension.
AssocIsDangerous	Determines whether a file type is considered a potential security risk.
AssocQueryKey	Searches for and retrieves a key related to a file or protocol association from the registry.
AssocQueryString	Searches for and retrieves a file or protocol association-related string from the registry.
AssocQueryStringByKey	Searches for and retrieves a file association-related string from the registry starting from a specified key.
SHCopyKey	Recursively copies the subkeys and values of the source subkey to the destination key. SHCopyKey does not copy the security attributes of the keys.
SHDeleteEmptyKey	Deletes an empty key.
SHDeleteKey	Deletes a subkey and all its descendants. This function removes the key and all the key's values from the registry.
SHDeleteValue	Deletes a named value from the specified registry key.
SHEnumKeyEx	Enumerates the subkeys of the specified open registry key.
SHEnumValue	Enumerates the values of the specified open registry key.
SHGetAssocKeys	Retrieves an array of class subkeys associated with an IQueryAssociations object.
SHGetValue	Retrieves a registry value.
SHOpenRegStream2	Opens a registry value and supplies a stream that can be used to read from or write to the value. This function supersedes SHOpenRegStream.
SHQueryInfoKey	Retrieves information about a specified registry key.
SHQueryValueEx	Opens a registry key and queries it for a specific value.
SHRegCloseUSKey	Closes a handle to a user-specific registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegCreateUSKey	Creates or opens a registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegDeleteEmptyUSKey	Deletes an empty registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegDeleteUSValue	Deletes a registry subkey value in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegDuplicateHKey	Duplicates a registry key's HKEY handle.
SHRegEnumUSKey	Enumerates the subkeys of a registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegEnumUSValue	Enumerates the values of the specified registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegGetBoolUSValue	Retrieves a Boolean value from a registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegGetIntW	Reads a numeric string value from the registry and converts it to an integer.
SHRegGetPath	Retrieves a file path from the registry, expanding environment variables as needed.
SHRegGetUSValue	Retrieves a value from a registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegOpenUSKey	Opens a registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegQueryInfoUSKey	Retrieves information about a specified registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegQueryUSValue	Retrieves the type and data for a specified name associated with an open registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegSetPath	Takes a file path, replaces folder names with environment strings, and places the resulting string in the registry.
SHRegSetUSValue	Sets a registry subkey value in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHRegSetValue	Sets a registry value. Use RegSetValue in its place.
SHRegWriteUSValue	Writes a value to a registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).
SHSetValue	Sets the value of a registry key.