To build a COBOL solution or project you use MSBuild.
You cannot create COBOL solutions or projects using Visual COBOL Build Tools for Windows, so before you can build a COBOL solution or project with Visual COBOL Build Tools for Windows you must have created it with Visual COBOL.
See To build a COBOL project for a brief overview of using MSBuild to build COBOL solutions and projects, or see the Visual Studio help for full details about using MSBuild.