Programming Forums > Application Development > C++

scicatur · May 12th, 2005, 12:17 PM

Hi,

I am new to dll programming and I have problem in using a dll library named litgen.dll which ships with litgen.idl . Now I don't have or intend to buy Microsoft Visual C++ or .NET environments. I prefer to use wingw (gcc variation for windows) for one because it's free of charge. Now I have code examples from microsoft to show me just how to use this dll ^properly^ but that's not going to work for me because those code examples are snobbish showoffs of almost every imaginable Microsoft specific programming tricks (like smart pointers, etc.etc.) not to mention that they require me to make litgen.h file using their midl.exe program which is shipped only to buying custormers with Visual C++ or .NET. What I wan't is just to use the functions in the dll the simplest way imaginable.

I guess luckily i got the .idl file with the dll, because it describes just what kinds of interfaces and functions there are inside the dll. But being new to the dll programming I just don't know how to gain access to them and use them. So if you could kindly give me example code how to use e.g. the Message() function described below.. (windows.h naturally available for my project)

Snippet from the .idl:

(Toggle Plain Text)

[object, uuid(6BC62165-B91C-4993-8002-5BC30B2D1196)]
interface ILITCallback : IUnknown
{
    //+-----------------------------------------------------------------------
    //
    //  Function:       Message
    //  Description:    receives a warning, error, or informational message
    //  Parameters:     iType - message type indicator:
    //                       0: fatal error
    //                       1: warning
    //                      -1: informational message
    //                  iMessageCode - see above
    //                  pwszMessage - null-terminated message text
    //  Returns:        S_OK
    //  Notes:
    //
    //------------------------------------------------------------------------
    HRESULT Message([in] int iType, [in] int iMessageCode, 
                    [in, string] const wchar_t* pwszMessage);
};

LOI Kratong · May 12th, 2005, 1:01 PM

Just out of interest why do you want to know how to do this in both c and c++? You've posted the same message in c and c++ forums!!

Just curious...

scicatur · May 12th, 2005, 1:15 PM

Why in both c and c++? Because I prefer c language solution to my problem but I don't wan't to exclude C++ solution either. Solutions in both languages are good for me and I believe that when I see solution written in C++ I can deduce it to C. Also C++ forum gets more audience.

And the rest of your message seems to be ambiguous. No my question was not a newbie question. I just signed in the forum and hadn't time to change my status. And no your "solution" is not helpful. You can go search google for the meaning for life for all that matters but this is a programming forum.

LOI Kratong · May 12th, 2005, 1:23 PM

Well that's a fair enough reason...

I think you've misinterpreted (is that how you spell that word?) my post. No wonder my 'post' seems ambiguous, it's my sig!

Fairly random sig!!!

scicatur · May 12th, 2005, 1:38 PM

Ok maybe i did misinterpret, misunderstandings happen so no hard feelings then.

LOI Kratong · May 12th, 2005, 1:46 PM

no none at all

May 12th, 2005, 12:17 PM	#1
scicatur Newbie Join Date: May 2005 Posts: 8 Rep Power: 0	Problem with using DLL from simple c++ program. Hi, I am new to dll programming and I have problem in using a dll library named litgen.dll which ships with litgen.idl . Now I don't have or intend to buy Microsoft Visual C++ or .NET environments. I prefer to use wingw (gcc variation for windows) for one because it's free of charge. Now I have code examples from microsoft to show me just how to use this dll ^properly^ but that's not going to work for me because those code examples are snobbish showoffs of almost every imaginable Microsoft specific programming tricks (like smart pointers, etc.etc.) not to mention that they require me to make litgen.h file using their midl.exe program which is shipped only to buying custormers with Visual C++ or .NET. What I wan't is just to use the functions in the dll the simplest way imaginable. I guess luckily i got the .idl file with the dll, because it describes just what kinds of interfaces and functions there are inside the dll. But being new to the dll programming I just don't know how to gain access to them and use them. So if you could kindly give me example code how to use e.g. the Message() function described below.. (windows.h naturally available for my project) Snippet from the .idl: (Toggle Plain Text) [object, uuid(6BC62165-B91C-4993-8002-5BC30B2D1196)] interface ILITCallback : IUnknown { //+----------------------------------------------------------------------- // // Function: Message // Description: receives a warning, error, or informational message // Parameters: iType - message type indicator: // 0: fatal error // 1: warning // -1: informational message // iMessageCode - see above // pwszMessage - null-terminated message text // Returns: S_OK // Notes: // //------------------------------------------------------------------------ HRESULT Message([in] int iType, [in] int iMessageCode, [in, string] const wchar_t* pwszMessage); }; [object, uuid(6BC62165-B91C-4993-8002-5BC30B2D1196)] interface ILITCallback : IUnknown { //+----------------------------------------------------------------------- // // Function: Message // Description: receives a warning, error, or informational message // Parameters: iType - message type indicator: // 0: fatal error // 1: warning // -1: informational message // iMessageCode - see above // pwszMessage - null-terminated message text // Returns: S_OK // Notes: // //------------------------------------------------------------------------ HRESULT Message([in] int iType, [in] int iMessageCode, [in, string] const wchar_t* pwszMessage); }; Last edited by scicatur; May 12th, 2005 at 1:05 PM. Reason: formatting

May 12th, 2005, 1:01 PM	#2
LOI Kratong Professional Programmer Join Date: May 2005 Location: Woo - Boot Sector! Posts: 294 Rep Power: 4	Just out of interest why do you want to know how to do this in both c and c++? You've posted the same message in c and c++ forums!! Just curious... __________________ www.heldtogether.co.uk

May 12th, 2005, 1:23 PM	#4
LOI Kratong Professional Programmer Join Date: May 2005 Location: Woo - Boot Sector! Posts: 294 Rep Power: 4	Well that's a fair enough reason... I think you've misinterpreted (is that how you spell that word?) my post. No wonder my 'post' seems ambiguous, it's my sig! Fairly random sig!!! __________________ www.heldtogether.co.uk

May 12th, 2005, 1:46 PM	#6
LOI Kratong Professional Programmer Join Date: May 2005 Location: Woo - Boot Sector! Posts: 294 Rep Power: 4	no none at all __________________ www.heldtogether.co.uk

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May 12th, 2005, 1:15 PM	#3
scicatur Newbie Join Date: May 2005 Posts: 8 Rep Power: 0	Why in both c and c++? Because I prefer c language solution to my problem but I don't wan't to exclude C++ solution either. Solutions in both languages are good for me and I believe that when I see solution written in C++ I can deduce it to C. Also C++ forum gets more audience. And the rest of your message seems to be ambiguous. No my question was not a newbie question. I just signed in the forum and hadn't time to change my status. And no your "solution" is not helpful. You can go search google for the meaning for life for all that matters but this is a programming forum.

May 12th, 2005, 1:38 PM	#5
scicatur Newbie Join Date: May 2005 Posts: 8 Rep Power: 0	Ok maybe i did misinterpret, misunderstandings happen so no hard feelings then.

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Programming Forums > Application Development > C++

Problem with using DLL from simple c++ program.