How to load DLL using C#? -

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i have small dll has 3 functions : init, load , run. i'm new c# read questions here, i've opened console project , wanted load dll , use it's functions. unfortunately - didn't work. can advise went wrong?

this error get:

unable find entry point named 'init' in dll  '....path dll....'.

this code:

using system; using system.collections.generic; using system.linq; using system.text; using system.runtime.interopservices;  namespace consoleapplication1 {    class program     {         [dllimport("c:\\desktop\\dlltest.dll", charset = charset.unicode)]         public static extern bool init();          [dllimport("c:\\desktop\\dlltest.dll", charset = charset.unicode)]          public static extern bool load(string file);            [dllimport("c:\\desktop\\dlltest.dll", charset = charset.unicode)]         public static extern bool play();            static void main()         {             console.writeline("got till here!!!");              init();              load("c:\\desktop\\the_thing_about_dogs_480x270.mp4");             play();          }     }

}

the thing can suspect maybe fact i'm not creating instance? besides that, no clue :(

* editing : * dll :

using system; using system.collections.generic; using system.linq; using system.text;  namespace dlltest {     public class dlltestapi     {     myinfo localplay;      public bool init()     {         localplay =  new myinfo();          return true;      }       public bool load(string file)     {         localplay.load(file);         return true;     }     public bool play()     {         localplay.startnewthread();         return true;     }      public bool stop()     {         localplay.dxstopwmp();         return true;      }     public bool pause()     {         localplay.dxpause();         return true;     }      public bool resume()     {         localplay.dxresume();         return true;     }     public bool close()     {         localplay.dxclose();         return true;     } } }

the error message tells problem is. dll not export function named init. possible reasons include:

  1. the dll not unmanaged dll.
  2. the dll not export function of name.
  3. the dll exports function, name decorated or mangled.

probably easiest way diagnose fault use tool dependency walker inspect dll's exports.

update

from edit question, clear item 1 reason. dll managed dll , incorrect attempt access using p/invoke. add reference console application project.


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