The VisualAge for C++ Editor monitor window appears displaying the compile and link output as your project's target is being generated. When the build is complete, the Parts Container is updated to reflect the newly created files (.pdb, .asm, .obj, .exe, etc.). These files are used when you debug, browse or analyze the program.
If there had been compiler errors, you could double-click on the error line in the Editor to open the source file to the line of code in error.