Passing a Structure with BSTR variable, inside a SafeArray pointer

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I have a client appliction that passes a SafeArray pointer to the Server application.Now this SafeArray has a structure with BSTR as a variable.When the server application receives this SafeArray pointer, then all the variables of the structure inside the SafeArray have the assigned values except the BSTR variable which shows "bad variable type" and its value cannot be accessed.

The Server Application is an ATL application, i.e. it is a COM application with threading model type set to "BOTH" and the client application is a MFC application.

Please let me know why is it so????

Please give me the solution with a code example if there is so... Thnaks