Strings description in msdn

Msdn:
Chapter 6: strings

Http://msdn.microsoft.com/library/en-us/dnw32dev/html/ora_apiprog6_topic1.asp

Table of contents

The BSTR
C-style lpstr and lpwstr strings
String terminology
Tools for processing ing strings
Preparing the BSTR
The returned BSTR
What to call
The whole string trip
A Unicode entry point example
Passing strings to the Win32 API
Dealing with in Parameters
Dealing with out parameters
What happened to my pointer?
Strings and byte Arrays
Getting the address of a variable of user-defined type