c# 4.0 - LoadLibrary not working while loading DLL built using Eclipse Neon 3 -


i have dlls core c++ projects, created using eclipse editor c/c++ developers. version neon.3 release (4.6.3). have used cygwin 64-bit compiler build c++ project.

here sample code core c++ project, created , built in eclipse:

__declspec(dllexport) int addition(int a,int b) {     return (a+b); }

now, want call functionalities these dlls in managed c++ project. that, loadlibrary method used full path specified dll loaded. furthermore, have windows forms application ui enter input , display results. application created using c#, in vs2010. results received calling managed c++ project method, internally calls core c++ project method.

this expected work. facing problem when try debug. loadlibrary call ends debugging session, without raising exception. have wrapped call in try-catch exception isn't caught.

but when run c# exe out folder, surprisingly working , giving expected results.

here managed c++ code snippet loading dll built in eclipse:

namespace addfromeclipse     {     #define add (int a,int b)     typedef int (* engadd) add;      typedef int (*f_funci)(int a,int b);      a::a(){}      int a::call()     {         int a;         cout<<"inside c++"<<endl;         hinstance hgetprociddll;         try{             hgetprociddll = loadlibrary(l"d:\\eclipse\\out\\myadd.dll");             //hgetprociddll = loadlibrary(l"myadd.dll");         }catch(...)         {             cout<<"unable load function"<<endl;         }          if(hgetprociddll != null)         {             f_funci funci = (f_funci)getprocaddress(hgetprociddll, "addition");             if(funci != null)             {                 = funci(10,20);                 cout<<"addition :"<<a<<endl;             }             else             {                 cout<<"unable load function"<<endl;             }         }         else         {             unsigned long lerr  = getlasterror();             cout<<"unable load dll"<<endl;         }         return 0;     }    };

following c# code calling managed c++ method simple addition:

using system; using addfromeclipse;  namespace execute {     class program     {         static void main(string[] args)         {             try             {                 console.writeline("inside me c#");                 obj = new a();                 obj.call();                 console.writeline("back c#");                 console.readkey();             }             catch (exception exception)             {                 system.windows.forms.messagebox.show(exception.message);             }         }     } }

does know how work out?

any appreciable.

thank you.


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