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Indicates if data field is optional.
[Visual Basic .NET] Public Function get_FieldOptional ( _ ByVal idx As Integer _ ) As Boolean
[C#] public bool get_FieldOptional ( int idx );
[C++]
HRESULT get_FieldOptional(
long idx,
Boolean* bOptional
);
[C++]
Parameters idx [in]
idx is a parameter of type long bOptional [out, retval]
bOptional is a parameter of type bool*