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The Essentials for Using COM in Managed Code

Jun 14, 2002

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This chapter is from the book 

.NET and COM: The Complete Interoperability Guide

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Conclusion

This chapter discussed a bunch of topics that are essential for using COM components in .NET applications. In this chapter, you've seen how to reference COM components via Interop Assemblies generated by the type library importer. Primary Interop Assemblies were also introduced, so you should understand why they should be used whenever possible instead of generating your own Interop Assemblies.

You've also seen the main ways to create a COM object:

With metadata:	`new` or `Type.GetType` `+` `Activator.CreateInstance`
Without metadata:	`Type.GetTypeFromProgID` or `Type.GetTypeFromCLSID` + `Activator.CreateInstance`

You've also seen how to invoke a COM object's methods via its v-table, or by late binding. The next chapter examines Interop Assemblies in detail so you can gain a better understanding on what to expect when using any COM objects in managed code, and how it differs from using them in COM-based languages.

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