IUrlAccessor::GetDocFormat method (searchapi.h)

Gets the document format, represented as a Multipurpose Internet Mail Extensions (MIME) string.

Syntax

HRESULT GetDocFormat(
  [out] WCHAR [] wszDocFormat,
  [in]  DWORD    dwSize,
  [out] DWORD    *pdwLength
);

Parameters

[out] wszDocFormat

Type: WCHAR[]

Receives a pointer to a null-terminated Unicode string containing the MIME type for the current item.

[in] dwSize

Type: DWORD

Size of wszDocFormat in TCHARs.

[out] pdwLength

Type: DWORD*

Receives a pointer to the number of TCHARs written to wszDocFormat, not including the terminating NULL.

Return value

Type: HRESULT

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

Remarks

The wszDocFormat is used to identify the correct IFilter for the stream returned by IUrlAccessor::BindToStream. Implement this method when the URL item is supposed to have a different association than is indicated by the file name extension or content type. For example, if .doc items are not associated with Microsoft Word, this method should return the CLSID Key key of the appropriate document source.

If you do not provide an implementation of this method or the IUrlAccessor::GetCLSID method, the filter host uses the out parameters from IUrlAccessor::GetFileName to determine the Multipurpose Internet Mail Extensions (MIME) content type.

Requirements