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  1. February 10th, 2006, 02:59 PM #1
    jmason309
    jmason309 is offline Junior Member
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    Question How do I use a DLL with C#?

    I am trying to use a DLL created with Visual Studio 6.0 from my C# application created with Visual Studio.NET 2003. As soon as I go to add a reference I get "A reference could not be added...Not a valid assembly or COM component..."

    If you can help me, please reply.

    Thanks,
    Jim Mason
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  2. February 10th, 2006, 03:24 PM #2
    MadHatter
    MadHatter is offline Senior Member
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    Re: How do I use a DLL with C#?

    1. register it w/ com
    2. wrap it in C++ w/ .net
    3. use system.runtime.interopservices to do a DllImport for each function you need.

    ex: Playsound

    [DllImport("winmm.dll")]
    public static extern bool PlaySound(string sound, IntPtr module, int soundFlags);
    Last edited by MadHatter; February 10th, 2006 at 03:30 PM.
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  3. February 10th, 2006, 03:30 PM #3
    jmason309
    jmason309 is offline Junior Member
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    Re: How do I use a DLL with C#?

    Thanks MadHatter. I'll give it a shot. I have a lot to learn here.
    Thanks Again,
    Jim
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