Notice the syntax is the same as the PATH variable, with semicolons separating the different elements. The default value for the PATHEXT variable is. When executing a command line whose first token does NOT contain an extension, then CMD.EXE uses the value of the PATHEXT environment variable to determine which extensions to look for and in what order. When executing a command line whose first token is CMD without an extension or path qualifier, then replaces CMD with the value of the COMSPEC variable, thus avoiding picking up random versions of CMD.EXE when you least expect them. This new behavior does NOT occur if executing within a command script. When executing an application that is a 32-bit GUI application, CMD.EXE does not wait for the application to terminate before returning to the command prompt. WINDOWS BATCH FILE TIME DELAY HOW TOSee the ASSOC and FTYPE commands for how to create these associations from within a command script. WORD.DOC would launch the application associated with the. Non-executable files may be invoked through their file association just by typing the name of the file as a command. If Command Extensions are enabled, external command invocation through the command line or the START command changes as follows: These are the parameters passed to the command/program If it is not an internal cmd command or batch file then it is a program and will run as either a windowed application or a console application. This means that the window will remain after the command has been run. If it is an internal cmd command or a batch file then the command processor is run with the /K switch to cmd.exe. Unless the application enables ˆC processing, ˆBreak is the only way to interrupt the application Start application without creating a new window. Start application and wait for it to terminate Start application in the REALTIME priority class Start application in the HIGH priority class Start application in the NORMAL priority class Start application in the IDLE priority class WINDOWS BATCH FILE TIME DELAY WINDOWSStart 16-bit Windows program in shared memory space Start 16-bit Windows program in separate memory space The new environment will be the original environment passed to the cmd.exe and not the current environment. Starts a separate window to run a specified program or command. The START command: Windows NT 4/Windows 2000 Syntax Read my SETLOCAL page if you intend to use SETLOCAL extension switches. Likewise, you may disable command extensions using SETLOCAL DISABLEEXTENSIONS or CMD /Y. However, to be absolutely sure that they are, either use SETLOCAL ENABLEEXTENSIONS within your NT shell scripts (batch files) or execute those scripts using CMD /X.
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