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SHRegEnumUSValueA function (shlwapi.h)

  • Άρθρο

Enumerates the values of the specified registry subkey in a user-specific subtree (HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE).

Syntax

LSTATUS SHRegEnumUSValueA(
  [in]                HUSKEY          hUSkey,
  [in]                DWORD           dwIndex,
  [out]               LPSTR           pszValueName,
  [in, out]           LPDWORD         pcchValueName,
  [out, optional]     LPDWORD         pdwType,
  [out, optional]     void            *pvData,
  [in, out, optional] LPDWORD         pcbData,
  [in]                SHREGENUM_FLAGS enumRegFlags
);

Parameters

[in] hUSkey

Type: HUSKEY

A handle to a currently open registry subkey. The subkey must have been opened with the KEY_SET_VALUE access right. For more information, see Registry Key Security and Access Rights.

This handle can be obtained through the SHRegOpenUSKey function.

[in] dwIndex

Type: DWORD

The index of the value to retrieve. This parameter should be zero for the first call and incremented for subsequent calls.

[out] pszValueName

Type: LPTSTR

A pointer to a character buffer that receives the enumerated value name. The size of this buffer is specified in pcchValueNameLen.

[in, out] pcchValueName

Type: LPDWORD

A pointer to a DWORD that, on entry, contains the size of the buffer at pszValueName, in characters. On exit, this contains the number of characters that were copied to pszValueName.

[out, optional] pdwType

Type: LPDWORD

A pointer to a DWORD that receives the data type of the value. These are the same values as those described under the lpType parameter of RegEnumValue.

[out, optional] pvData

Type: void*

A pointer to a buffer that receives the data for the value entry. The size of this buffer is specified in pcbData. This parameter can be NULL if the data is not required.

[in, out, optional] pcbData

Type: LPDWORD

A pointer to a DWORD that, on entry, contains the size of the buffer at pvData. On exit, this contains the number of bytes that were copied to pvData.

[in] enumRegFlags

Type: SHREGENUM_FLAGS

One of the SHREGENUM_FLAGS that specifies the base key in which the enumeration should take place.

Return value

Type: LSTATUS

Returns ERROR_SUCCESS if successful, or a nonzero error code defined in Winerror.h otherwise. You can use the FormatMessage function with the FORMAT_MESSAGE_FROM_SYSTEM flag to retrieve a textual description of the error.

Remarks

Note

The shlwapi.h header defines SHRegEnumUSValue as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional, Windows XP [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header shlwapi.h
Library Shlwapi.lib
DLL Shlwapi.dll (version 4.71 or later)