numerical calculation;  Application programming interface;  Interface module;  Invoke conventions;  Hybrid compilation

How to correctly call the Win32 API functions provided by the Windows operating system to extend Visual Fortran’s functions in window management, memory management, drawing, multithreading, etc., is a problem often faced by the current numerical computing WineIOWS application development. This is discussed more systematically, including how the Win32 API interface modules provided by Visual Fortran are organized. How the interfaces are encapsulated, how to set consistent strings, pointers, and structures according to the interface definition, Fortran arguments, etc. And illustrate with typical examples. Provides how-to instructions for Win32 API function calls on the Vis-ual Fortran platform.