IBindStatusCallbackEx::GetBindInfoEx method

Статья
07/13/2016

Provides information about how the bind operation is handled when called by an asynchronous moniker.

Syntax

HRESULT GetBindInfoEx(
  [out]     DWORD    *grfBINDF,
  [in, out] BINDINFO *pbindinfo,
  [out]     DWORD    *grfBINDF2,
  [out]     DWORD    *pdwReserved
);

Parameters

grfBINDF [out]
A bitwise combination of BINDF enumeration values that indicates how the bind process is handled.
pbindinfo [in, out]
A BINDINFO structure that describes the binding requirements of the client application.
grfBINDF2 [out]
A BINDF2 enumeration value that specifies additional information for the bind.
pdwReserved [out]
Reserved. Must be set to NULL.

Return value

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

Remarks

This method exists because the grfBINDF parameter in GetBindInfo can contain no additional flags. This method inherits all behaviors of GetBindInfo and adds some of its own. Therefore, the Remarks section of GetBindInfo applies to this method in full.

Relative to the GetBindInfo method, the IBindStatusCallbackEx::GetBindInfoEx method provides the additional parameters grfBINDF2 and pdwReserved. The data in grfBINDF2 is an extension of the data in the grfBINDF parameter.

Examples

Internet Explorer 8 and later can download files greater than 4 GB in size by using a new BINDF2 flag for that purpose. The following code example shows how this can be done.

IBindStatusCallbackEx* pBSCB = NULL;
MyBindCallbackEx::CreateInstance(&pBSCB);  // MyBindCallbackEx is IBindStatusCallbackEx.

IMoniker* pMoniker = NULL;
CreateURLMonikerEx(NULL, wszFileUrlPath, &pMoniker, URL_MK_UNIFORM);

IBindCtx* pBindCtx = NULL;
CreateAsyncBindCtx(0, pBSCB, NULL, &pBindCtx); 

IStorage* pStorage = NULL;
pMoniker->BindToStorage(pBindCtx, NULL, IID_IStorage, (void**)&pStorage);

// MyBindCallbackEx class implementation 
STDMETHODIMP MyBindCallbackEx::GetBindInfoEx (DWORD *pgrfBINDF,
                                              BINDINFO* pbindinfo,
                                              DWORD* pgrfBINDF2,
                                              DWORD* pdwReserved)
{
    *pgrfBINDF2 = BINDF2_READ_DATA_GREATER_THAN_4GB; // Enable 4 GB download flag.

    hr = GetBindInfo(pgrfBINDF, pbindinfo);
}

Requirements

Minimum supported client	Windows XP with SP2
Minimum supported server	Windows Server 2003
Product	Internet Explorer 8
Header	Urlmon.h
IDL	Urlmon.idl
DLL	Urlmon.dll

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