This trick is especially useful for linker errors, because the linker doesn't provide as much error detection help as the compiler does. This is the place to look. There are two iostream class libraries, the old and the new. The old library, documented here, follows the original de facto standard. Use standard functions and classes whenever possible.
Programmers are often surprised by what is actually contained in the standard library.
If you want more, read the Developer Studio Environment , Text Editor , and Debugger sub volumes of the Developer Studio Environment User's Guide , or read the Getting Help volume. It's too incomplete to be really useful. In addition, the toolbar contains dark blue up and down arrows for going to the previous and next topic in the IV database, and a useful synchronization button on the far left end of the toolbar that shows where the IVT currently being displayed is located on the tree control. Searching the Index Searching the IV index is the most common way to find information. Click the Index tab of the Search dialog to start.