SHCreateStreamOnFileW function (shlwapi.h)

Article
11/20/2024

[SHCreateStreamOnFile is available for use in the operating systems specified in the Requirements section. It may be altered or unavailable in subsequent versions. Instead, use SHCreateStreamOnFileEx.]

Opens or creates a file and retrieves a stream to read or write to that file.

Syntax

LWSTDAPI SHCreateStreamOnFileW(
  [in]  LPCWSTR pszFile,
  [in]  DWORD   grfMode,
  [out] IStream **ppstm
);

Parameters

[in] pszFile

Type: LPCTSTR

A pointer to a null-terminated string that specifies the file name.

[in] grfMode

Type: DWORD

One or more STGM values that are used to specify the file access mode and how the object that exposes the stream is created and deleted.

[out] ppstm

Type: IStream**

Receives an IStream interface pointer for the stream associated with the file.

Return value

Type: HRESULT

If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

SHCreateStreamOnFileEx fully supports all STGM modes and allows the caller to specify file attributes if creating a new file.

Note

The shlwapi.h header defines SHCreateStreamOnFile as an alias that 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 is 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 XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	shlwapi.h
Library	Shlwapi.lib
DLL	Shlwapi.dll (version 5.0 or later)

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