This section lists and describes Microsoft run-time library routines by category. For reference convenience, some routines are listed in more than one category. Multibyte-character routines and wide-character routines are grouped with single-byte – character counterparts, where they exist.

The main categories of Microsoft run-time library routines are:

Argument access	Floating-point support
Buffer manipulation	Input and output
Byte classification	Internationalization
Character classification	Memory allocation
Data alignment	Process and environment control
Data conversion	Robustness
Debug	Run-time error checking
Directory control	Searching and sorting
Error handling	String manipulation
Exception handling	System calls
File handling	Time management

Run-Time Routines by Category

See Also