using VC++ midl.exe

I wrote a Hello.idl and compiled it with idltojava and it worked fine.  When I try to compile Hello.idl with Microsofts Visual C++'s midl.exe it gave me errors.  Why is this so?  I thought i should  be ablt to converted idl files to either java or C++.
tekelAsked:
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jkrConnect With a Mentor Commented:
What does your .idl file look like? It should be sth. like

[ uuid (53D5C100-25F6-11D1-B64C-000012df6b3e),
  version(1.0),
  pointer_default(unique)
]
interface Hello
{
}
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jkrCommented:
What errors did it give?
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tekelAuthor Commented:
// commmand
:\>midl hello.idl

// error
..\hello.idl(2) : error MIDL20797 : no [uuid] specified : [ Interface 'Hello' ]
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tekelAuthor Commented:
that helped .. why did I need to have those 4 lines above when compiling with midl.exe and not with idltojava?

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