How can I add a C++ DLL file in my .NET application?

Question

score 6 · Answer 1 · answered Feb 08 '10 at 17:18

6

You would use an "extern" function, marked with the DllImport attribute.

[DllImport(@“C:\mylib.dll”)]
public static extern int myFunc(int param);

answered Feb 08 '10 at 17:18

John Gietzen

score 6 · Answer 2 · answered Feb 08 '10 at 17:22

6

Depending on the nature of the DLL, you can

answered Feb 08 '10 at 17:22

dtb

score 0 · Answer 3 · edited Aug 06 '12 at 17:34

0

If it's registered in COM, you can simply add a COM reference in Visual Studio and Visual Studio will do all the Interop creation for you.

edited Aug 06 '12 at 17:34

Peter Mortensen

answered Feb 08 '10 at 17:22

Steve Danner

score 0 · Answer 4 · answered Feb 08 '10 at 17:22

0

Assuming you use Visual Studio, in your Solution right click "references" and choose "Add Reference". Select your dll file.

In the classes that will use the dll, add : using MyLibrarysName;

then you can call the functions in that DLL using Mylibraryname.myfunction

answered Feb 08 '10 at 17:22

Roast

Yeah... thats exactly how to do it in simple step by step instructions. I dont understand why anyone would vote that down. +1 – StingyJack Feb 08 '10 at 18:17
If the DLL is a C++ dll, add reference doesn't allow to add this reference. The error report says: "A reference to ''could not be added. Please make sure that the file is accessible and that it is a valid assembly or COM component.' The standard C++ value doesn't have an assembly, nor is it a COM component – Harald Coppoolse Jun 19 '14 at 14:55

4 Answers4