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As implemented in Step 1, Container is almost fully functional as a general-purpose OLE container application, but it needs some refinement. To accomplish this, Step 2 adds the following:
To demonstrate why this is necessary, you will be asked to run Step 1 of Container. For that reason, you should save the Step 1 version of Container.exe before you start working on Step 2.
You will probably need to make similar refinements in your container applications, although the details may vary.