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u acn call c program through DLLIMPORT functionality of c#
rahul
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But therefore I have to create a DLL of the C-Programm?
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Is it possible to make two projects in one workspace and make in the C# project a referenc to the C/C++ project??
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strizi wrote: Is it possible to make two projects in one workspace and make in the C# project a referenc to the C/C++ project??
Why would you want to do that? Why not just use one language?
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Because the C-Program is used for a "DOS-Compiler" and should also be used in a C# Project for a new Windows Application...
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Try creating a C#, and a C/C++ class library project under the same solution, and link them.
Personally, I'd be searching for ways to do it all in one language if it were at all possible.
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Meanwhile I have tried to link a C# and a C++ project in the same workspace. I can make the link in c# to the C++ project, but I can not use the functions from C++.
Please, can you give me a description how I have to link tht projects.
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This might help
Otherwise "C# - link to c++ dll" in Google will give you plenty of examples.
Cheers,
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Sorry, but is the only way to use the C++ functions in C# with DLL?
I dont want to generate a DLL, because I have to change the C-files (_dllexport....). And when I have to change the C-files, it´s better to invest the time to writte the Code in C#
I want only to copy the C-Files into the managed/unmanged C++ Project without any changes, and than using the functions in C#.
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Yes - The only way is to use C++ files in C# is using a DLL.
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As far as I know there are two common ways to do this. One is as mentioned (not particularly helpfully) through P/Invoke and use of attributes such as DLLImport. Note, I do not thing you need to recompile it as a DLL to achieve this.
The other (probably preferred method) is to change if possible the C executable into a C++/CLI or managed assembly. This will still allow you to use C for everything but you can then expose managed wrappers around the necessary functions for C# to call easily. In this instance you can simply add a reference to the project in Visual Studio and use it like it were another assembly written in C#.
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I want to the second way.
I have create a C# and an C+/CLI project in the same workspace. I have also added a reference to the C# project, but I can not use any function.
Do you have a code-example?
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Just put together a very simple application, I wasn't able to get it to reference methods in an executable but compiling the C++/CLI project as a library was fine. You can download it from here:
<a href="http://downloads.pooredesign.com/CS-Test.zip" rel="nofollow">http: The project was created using Visual Studio 2008 for your information.
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Thanks a lot for the sample!!!
But I think, that I can not copy some C-files (*.c, *.h) to the project CLib without any changes on the files...
or, do you have any idea?
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strizi wrote: But I think, that I can not copy some C-files (*.c, *.h) to the project CLib without any changes on the files...
Have you tried it?  If it does not compile then there's cause for concern. If it does then all well and good.
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Sorry, but on looking through the code I havened seen (unerstand) the NativeMethods.cpp
Now I understand the Porgram, and this is exact the program, what I am looking for.
MANY THANKS
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Hello All,
I have an unmanaged dll (xxx.dll). I want to use the methods of this dll in a c# windows application. But I'm getting the following error while executing the code:
Unable to load DLL '...'. The specified module could not be found. [Exception from HRESULT: 0x8007007E]
I have also placed the dll in System32 folder.
Any ideas to solve this issue?
Thanks in advance
 Shahtech
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Hi,
I found the solution. Earlier I have not added the supporting dlls to C:\WInNT\System32 folder and Bin folder of application.
This solved my problem.
Thanks,
shahtech
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Many times i c people use Type.missing and sometimes null . are they same or have any difference.
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Hi Mogaambo,
Type.Missing indicates that you want to use the default value for the specified parameter.
Null basically means empty.
Cheers,
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How to Chenge MESSEGE BOX font.
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You can't change most aspects of the standard messagebox directly. You could always create a custom form class that mimics the messagebox in order to do this. There is a really good custom messagebox class in the form of an article. I suggest you search for it.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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i m using SQL server 2005.in this i have a field "Place". i have made a form in which i have used drop down list in which these Place field is shown.in C# i want a code so that if user select the particular place from that drop down list, that should be entered in the database of SQL server 2005.i have made a add button on the form for the user to add the selected place in the database.the required coding i have to write in this add button.Please reply me urgently........
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What have you tried doing so far? Show what code you have tried.
Preeti1979 wrote: reply me urgently........
That is considered rude. Please refrain from that 
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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