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Checking passwords the secure way. This post explains how you can implement a secure password system. A system where you don't have to send your password over the internet to be validated. It explains about HMAC and Cram-MD5. Some examples (in C#.Net) are included to demonstrate implementation of the system.

How to use a native DLL (or C++ DLL) in your managed .Net code? This post shows which types are interoperable, how to import a DLL, how to pass strings, how to pass structures and how to de-reference pointers.

AJAX the simple way. Without XMLDocuments and frameworks. Just plain DHTML

How to create a custom AUTH sink for Microsoft SMTP. The post shows you how the managed wrappers are used, how to read the protocol input, how to write protocol output, how to read additional lines of input after the bound event is done with the SetCallback method, how to create new authentication schemes, how to set the CommandStatus, how to use the session's propertybag, how to accept or decline within the protocol, and more...