A module-definition file is a text file that describes the name, attributes, exports, imports, system requirements, and other characteristics of an application or dynamic-link library (DLL) for Microsoft Windows. This file is required for Windows DLLs and applications, and QuickWin programs. files;statements@defined>
You specify a module-definition file in the project. The module-definition file gives the linker the information it needs to determine how to set up the application or DLL it creates.