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IDispatch::GetTypeInfo

  • Статья

This method retrieves the type information for an object.

HRESULT GetTypeInfo( 
  unsigned int iTInfo, 
  LCID lcid, 
  ITypeInfo FAR* FAR* ppTInfo 
);

Parameters

  • iTInfo
    [in] Type information to return. Pass zero to retrieve type information for the IDispatch implementation.
  • lcid
    [in] Locale identifier for the type information. An object may be able to return different type information for different languages. This is important for classes that support localized member names. For classes that do not support localized member names, this parameter can be ignored.
  • ppTInfo
    [out] Receives a pointer to the requested type information object.

Return Values

The following table shows the return values for this function.

Value Description
S_OK Success; the type information element exists.
DISP_E_BADINDEX Failure; iTInfo parameter was not 0.
TYPE_E_ELEMENTNOTFOUND Failure; iTInfo parameter was not 0.

Example

The following code from the sample file Lines.cpp loads information from the type library and implements the member function GetTypeInfo.

// These lines are from CLines::Create load type information for the
// Lines collection from the type library. 
hr = LoadTypeInfo(&pLines->m_ptinfo, IID_ILines);
if (FAILED(hr))
goto error;

// Additional code omitted for brevity.

// This function implements GetTypeInfo for the CLines collection.
STDMETHODIMP
CLines::GetTypeInfo(
UINT iTInfo,
LCID lcid,
ITypeInfo FAR* FAR* ppTInfo)
{
*ppTInfo = NULL;

if(iTInfo != 0)
return ResultFromScode(DISP_E_BADINDEX);

m_ptinfo->AddRef();
*ppTInfo = m_ptinfo;

  return NOERROR;
}

Requirements

OS Versions: Windows CE 2.0 and later.
Header: Oaidl.h, Oaidl.idl.
Link Library: Oleaut32.lib, Uuid.lib.

See Also

IDispatch

Last updated on Wednesday, April 13, 2005

© 2005 Microsoft Corporation. All rights reserved.