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What do you mean by a dll which compiles with C#? I think you have a native (C++) dll which you want to use in C#. As already suggested you can either use PInvoke to call the functions from that dll or if its a COM dll you might be interested in generating a tlb for it, then you can add the reference to this .tlb in your C# application and consume it. I am a HUMAN. I have that keyword (??? too much) in my name........ ;-)_AnsHUMAN_b>

So have you used the debugger to step into that method to find out why? "Love people and use things, not love things and use people." - Unknown "The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Are you sure capacitance is the word you're looking for? If so, why would you need to know such low-level (i.e., electronics) information? Perhaps you're looking for GetDiskFreeSpaceEx() instead? "Love people and use things, not love things and use people." - Unknown "The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Use netstat. netstat -p TCP /b to list all opened TCP ports along with the exe's name. or see telnet Somethings seem HARD to do, until we know how to do them. ;-)_AnShUmAn_

Hamid. wrote: Oh your answer is very compressed! (maybe its mp5 ). MP5 .. i am thinking MPEG 8 "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow Never mind - my own stupidity is the source of every "problem" - Mixture cheers, Alok Gupta VC Forum Q&A :- I/IV Support CRY- Child Relief and You

greatly thanks.