How has COM+ Application Security changed in Visual Basic .NET?
COM+ applications can provide controlled access to resources. Using roles, developers can administratively construct an authorization policy for an application, choosing which users can access which resources, even down to the method level, if necessary. Additionally, roles provide a framework for enforcing security-checking within code if an application requires finer-grained access control. Role-based security is built on a general mechanism that enables developers to retrieve security information that is related to all upstream callers in the chain of calls to one particular component. Visual Basic 6.0 developers can handle user-role information using the SecurityCallContext class. In Visual Basic 6.0, developers can access the members of SecurityCallContext without declaring a specific instance of this type, by using the GetSecurityCallContext global function provided by the IGetSecurityCallContext interface and accessing the object returned. Visual Basic .NET developers can get si
