Release 10.1A: OpenEdge Development:
.NET Open Clients

> ## Passing a DATASET or DATASET-HANDLE as an OUTPUT parameter

> When the client application calls a method with a static ProDataSet (`DATASET` parameter) `OUTPUT` parameter, the client must provide a variable of the strongly typed DataSet class provided by ProxyGen. In this case, the client does not need to instantiate the object.

> When the client application calls a method with a dynamic ProDataSet (`DATASET-HANDLE` parameter) `OUTPUT` parameter, the client must provide a variable of type `System.Data.DataSet.` Again, the client does not need to instantiate the object. In this case, the parameter can be returned as `Unknown` or undefined. As a result, you must ensure the client code is written to handle these cases.

> On return from the method, the client can access the rows of the tables contained in the ProDataSet using the `Tables` and `Rows` properties on the on the strongly typed DataSet or `System.Data.DataSet` class.

> Any data in the parameter at the time of the method is replaced on return from the proxy call. All output data is immediately available to the client after the proxy call returns.

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