~~Title: Run~~
<evalcmd>
Run && bool or int or string && Success/failure, result code or captured output. &&
[command] && string && Command line to run. &&
[flags] && string && Flags. &&
[files] && array && Files to pass to the command.
</evalcmd>

Runs a command. The //command// string can be any internal Opus command or external program, and and can consist of multiple lines (separated by CR/LF).

The optional //flags// argument should be a string containing one or more of the following flags:
|a|Asynchronous. Does not wait for the command to finish.|
|d|MS-DOS mode. Runs the command as a DOS process.|
|e|Elevate. Runs the command as an administrator (external only).|
|o|Capture output from the command (implies **d**).|
|s|Script. Runs the command as a script. Language must be set with a **@language** directive at the top of the //command// string.|
|w|WSL. Runs the command as a WSL function.|

If asynchronous, the return value is either true or false.
If synchronous, the return value is either the exit code of the command or process, or the captured output text as a string.