Warning: "No local application has been provided. You can set it in the Run menu, Parameters" Dynamic DLL Creation Problem in C++ in DEV++

Question

I am trying to create a DLL with the code that the teacher passed, but it does not compile correctly. Keeps appearing the warning:

"No local application provided. You can set it in the Run menu, Parameters"

1. What would those be Parâmetros which I must put?
2. In this case I want to show the HelloWord on the screen, I would have to create a file .dll in a text editor and put inside it HelloWord? And then compile it?

Follow the main DLL:

 #include <windows.h>
 #include <iostream>

 using namespace std;
 typedef void (*MyFunc)(void);

 /* run this program using the console pauser or add 
  your own getch, system("pause") or input loop */

 int main(int argc, char** argv) {

     HINSTANCE hinst;
     MyFunc Hello;
     hinst = LoadLibrary("MyDLL.dll");
     if (!hinst)
     {
         MessageBox(0,"DLL File not found!", "Error", MB_ICONERROR);
         exit(0);
     }

     Hello = (MyFunc)GetProcAddress(hinst,"HelloWorld");
     Hello();
     FreeLibrary(hinst);
     exit(0);

     return 0;
}

Follows the function DLL:

#ifndef _DLL_H
#define _DLL_H

#if BUILDING_DLL
#define DLLIMPORT _declspec(dllexport)
#else
#define DLLIMPORT _declspec(dllimport)
#endif

DLLIMPORT void HelloWord();

#endif

Answer 1

It looks like you are trying to run the DLL project.

You need to create two projects:

• a project of the type DLL where you will place the code of your Helloworld() function in the dllmain.cpp file;
• and a project of the type Console Application where you will place the main() function code in the main.cpp file.

Create projects in the same directory.