Overview of Interoperability Broadly, there are three Microsoft techniques for calling between native COBOL and マネージ code: CCW, RCW and Platform Invoke.
Calling a .NET Class from Native COBOL, Using CCW The COM-callable-wrapper (CCW) is a .NET technique for COM interoperability. CCW wraps managed code as a COM object so that
native code can call it like any other COM object.