At link time, any program that calls a particular API function must be linked to a library (.LIB) containing information about the function. Link-time libraries provide information that allows the operating system dynamically to link the appropriate dynamic link library (.DLL) to a program at program load time. The default directory where each API is installed is given.

Note: You can use dynamic loading and address resolution instead of the import libraries specified here. See the IBM OS/2 Programming Toolkit online programming information or the OS/2 Technical Library, Programming Guides for more information about these techniques.