How can access Shared DLL

Discussion in 'Questions (Windows Mobile)' started by sanatci, May 16, 2009.

  1. sanatci

    sanatci New Member Licensed User

    Hi Guys,
    I'm newbie on basic4ppc, but i like it so much, easy, user friendly, rich functions and libraries. Congratulations to all basic4ppc community.
    I tested some examples on desktop and CE 5.0 OS device. Everything is excellent.
    Now, i want to use basic4ppc for a real project for mapping and navigation. I'm sorry, i'm not sharing map company name, it's confidential and i signed an agreement. They have a shared dll and it have some functions to be call.
    I know only this DLL suitable for embedded Visual C++ and also i have functions reference.
    How can i use basic4ppc with this DLL ?
    Thanks a lot,
  2. agraham

    agraham Expert Licensed User

    You need a Basic4ppc library written that acts as an interface to, or wrapper for, that native library. Such a library is a .NET assembly usually written in C# or VB.NET. The most convenient way to write such a library is with Visual Studio 2005 or 2008 or with the free SharpDevelop IDE. If the library is plain C++ it is probably possible, if it is a COM library things may be a little bit more difficult. A lot depends upon how the native library is implemented.
  3. sanatci

    sanatci New Member Licensed User

    .net functions equivalents

    Is it possible following .net functions equivalents in basic4ppc ?
  4. agraham

    agraham Expert Licensed User

    Those are not .NET functions, they are native Win32 API calls. They are not accessible from within Basic4ppc and are not relevant in a .NET language.

    LoadLibrary, GetProcAddress and FreeLibrary are taken care of by the .NET Framework when using DllImport to P/Invoke native functions from managed code. A Basic4ppc library could do this for a Basic4ppc program to access functions in a native dll.

    Equivalent (more or less) functionality to CallWindowProc is available in .NET but varies according to the platform and version of .NET. To use it successfully you will need a knowledge of Windows message handling (which you may already have) and some knowledge of .NET (which I suspect you may not yet have).
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