Check out this illustration of the functions of COM Single Thread Apartment (STA), Multithread Apartment (MTA), and ATL Auto-thread Module with a testing client-server application.
Latest Apartments & Threading Articles
Understanding COM Apartments, Part I
In the first part of a two-part series on COM apartments, Jeff Prosise describes what apartments are, why they exist, and how to avoid the problems that they introduce.
Understanding COM Apartments, Part II
In the completion of his two-part series on understanding COM apartments, Jeff Prosise illustrates why the lessons learned in last month's discussion of COM apartments are so important by giving concrete examples of how this knowledge can help you develop better and more efficient COM applications.
Latest Developer Videos
More...Latest CodeGuru Developer Columns
Control Statements and Basic Loops in C++/CLI
Become more proficient on the usage of statements to control the flow of execution through a C++/CLI application.

Making Sounds with Waves Using C#
Learn to manipulate existing sound files, and then to create your own custom sounds. You even can dial a telephone from your code.

Saving ListView Content to a Text File Using Visual Basic
Learn what a ListView is, and how to leverage Visual Basic to save its contents to a text file.
The Top Challenge for Developers is...
Most developers face a grueling challenge to please their end users. We asked their top challenge is. With over 3,000 responses, the results are now available!