Need informations

I need some informations about the scripting with Ruby.

Is it possible to do this feature directly (or indirectly) :
- manage processus (start, get the status, stop),
- get the return of a program,
- get the program output,
- the exploit of SQL's request is easy ?
- access to COM component is possible ?
- access to the AD (test the presence of an object, find his full
path, ...
- exchange variables between processus,
- have a graphic interface to request informations to the user,
- do libraries (with version, ...) ?

A lot of questions who don't have founded answers...

Thank you in advance for your answers,

Best regards,
Doc'
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