PWB integrates several Microsoft tools to produce a complete development environment. Among those tools are NMAKE, a program maintenance utility, and CodeView, a symbolic debugger. You saw how PWB uses NMAKE to build programs; now you can use PWB as a gateway to CodeView.
Earlier, you chose Use Debug Options in the Build Options dialog box. A debug build typically includes the compiler options that generate CodeView information. Therefore, the program is ready to debug with the CodeView debugger.