Determines whether two interface identifiers are equal.
BOOL IsEqualIID(
REFGUID riid1, //Interface identifier to compare to riid2
REFGUID riid2 //Interface identifier to compare to riid1
);
Windows NT: Use version 3.1 or later.
Windows: Use Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in winerror.h.