Microsoft® Windows® System Debugger (WDEB386.EXE) is used to test and debug Windows applications, dynamic-link libraries (DLLs), and virtual device drivers (VxDs) running with the Microsoft Windows operating system. You use System Debugger commands to inspect and manipulate memory and registers, control the execution of code, and perform other debugging operations. This section describes the debugger, explains how to start and use the debugger, and provides detailed information about the debugger commands.