ITypeInfo::GetVarDesc

项目
06/30/2006

This method retrieves a VARDESC structure that describes the specified variable.

HRESULT GetVarDesc( 
  unsigned int index, 
  VARDESC FAR* FAR* ppVarDesc 
);

Parameters

index
[in] Index of the variable whose description is to be returned. The index should be in the range of 0 to 1 less than the number of variables in this type.
ppVarDesc
[out] On return, pointer to a pointer to a VARDESC that describes the specified variable.

Return Values

The following table shows the return values for this function.

Value	Description
S_OK	Success.
E_OUTOFMEMORY	Out of memory.
E_INVALIDARG	One or more of the parameters is invalid.
TYPE_E_IOERROR	The function could not read from the file.
TYPE_E_INVDATAREAD	Invalid data.
TYPE_E_UNSUPFORMAT	The type library has an older format.
TYPE_E_INVALIDSTATE	The type library could not be opened.

Remarks

To free the VARDESC structure, use ITypeInfo::ReleaseVarDesc.

Example

CHECKRESULT(ptypeinfo->GetVarDesc(i, &pvardesc));
idMember = pvardesc->memid;
CHECKRESULT(ptypeinfo->GetDocumentation(idMember, &bstrName, NULL, NULL, 
NULL));
ptypeinfo->ReleaseVarDesc(pvardesc);

Requirements

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

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