SafeArrayGetIID function (oleauto.h)

Gets the GUID of the interface contained within the specified safe array.

Syntax

HRESULT SafeArrayGetIID(
  [in]  SAFEARRAY *psa,
  [out] GUID      *pguid
);

[in] psa

An array descriptor created by SafeArrayCreate.

[out] pguid

The GUID of the interface.

This function can return one of these values.

Return code	Description
S_OK	Success.
E_INVALIDARG	The argument psa is null or the array descriptor does not have the FADF_HAVEIID flag set.