Creates a new TEDValue instance with the specified data type.
class function CreateValue(ADataType: Word): TEDValue; overload;class function CreateValue(ADataType: Word; ACanBeNull: boolean): TEDValue; overload;class function CreateValue(ADataType: Word; ACanBeNull: boolean; AllowNullableString: Boolean; AllowNullableBytes: Boolean): TEDValue; overload;