dllimport

I could use help with how to properly import several functions from a C++ DLL into my C# application. Here are a couple examples from the C++ side that show what I am trying to do in C#. I do not think I am properly marshaling either/or some of the return types and some of the parameters (especially pointers/ref/out). C++ Header File Declarations: unsigned long __stdcall mfcsez_initialisation(unsigned short serial); unsigned char __stdcall mfcs_get_serial(unsigned long int handle, unsigned short * serial); unsigned char __stdcall mfcs_read_chan(unsigned long int handle, unsigned char canal,

This is basically the same question as [SO]: C2491: 'std::numpunct<_Elem>::id' : definition of dllimport static data member not allowed [closed] , but considering the following facts: That (on my opinion) is a perfectly valid question (according to [SO]: How to create a Minimal, Complete, and Verifiable example ), I really don't know why some users felt the urge of closing it The answer marked as a solution provides guidelines the for fixing the error (in general), but doesn't apply to current case, and certainly, doesn't fix it , please don't close it or mark it as a duplicate (at least, not

I am new in microsoft world. I have lot of problem trying to pass a simple string from c# to dll/c++ I have read a lot of post and documentation about but the problem is the same. C++ code extern "C" __declspec(dllexport) int Init( long l , char* url ); C# code [DllImport("MCRenderer.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = false)] public static extern int Init(long a, StringBuilder url); Init(hndl.ToInt64(), str ); what haeppen is that long value is passed correctly while string parameter is 0x00000000 <Bad Ptr> can you help me ... Iam really confused thanks!! AG You

I downloaded the "smilenet-1.2.1-win64-academic" library from this page and imported the smileNET.dll in my Unity project. Then I restarted my visual studio, and when I tried to use the library, it gave me an error that the type or namespace could not be found. I tried using Smile; and using smileNET; as indicated in their documentation file Hello.cs but it did not work. I tried 64 bit version as well as 32 bit one. My unity version is 2018.1.8f1 64bit When I inspected the downloaded dll, it said that the >NET version is v4.0.30319 while my VS2017 is running version 4.7.03056 , could that be a

I'm writing a wrapper for a dll. The dll has a method whose signature resembles the following: unsigned long aMethod(void *anyParameter, void (*anotherMethod)(const char *, void *)) I've searching at google for a tutorial to give me insight on how to write the signature on C# so the framework can do the marshalling process. How can it be written? Do you know about any tutorial, book or documentation on this subject? [UnmanagedFunctionPointer(CallingConvention.Cdecl)] delegate void AnotherMethodDelegate(string s, IntPtr anyParameter); [DllImport("dllname", CallingConvention = CallingConvention