public void Clear()
{
// Can't pass "this" by ref, so make a copy to call PropVariantClear with
PROPVARIANT var = this;
PropVariantClear(ref var);
// Since we couldn't pass "this" by ref, we need to clear the member fields manually
// NOTE: PropVariantClear already freed heap data for us, so we are just setting
// our references to null.
vt = VarEnum.VT_EMPTY;
ptr = IntPtr.Zero;
}
public virtual extern void GetValue([In] ref PropertyKey key, out PROPVARIANT pValue);
private static extern Int32 PropVariantClear(ref PROPVARIANT pvar);
public virtual extern void GetAt([In] uint index, [In, Out] ref PropertyKey pKey, out PROPVARIANT pValue);
