#include <windows.h>
 
 
 
typedef void (*function1_ptr) ();
 
function1_ptr function1=NULL;
 
 
 
 
 
int APIENTRY WinMain(HINSTANCE, HINSTANCE, LPSTR, int) { 
 
 
 
    HMODULE myDll = LoadLibrary("myfile.dll"); 
 
 
 
    if(myDll)      
 
       function1 = (function1_ptr) GetProcAddress(myDll,"function1");  
 
 
 
    if(function1)  
 
       function1();
 
 
 
    FreeLibrary(myDll);
 
 
 
    return 0;
 
}

#include <windows.h>
 
extern "C" {
 
    //functions callable in dll
    void __declspec (dllexport) function1() {
        MessageBox (NULL, "test message","test title",0);
    }
 
}
 
BOOL WINAPI DllMain (HINSTANCE, DWORD, LPVOID) {
    return TRUE;
}

// prototype the function that is in the DLL
void __declspec (dlimport) function1();
 
int main()
{
     function1(); // call the function in the DLL
 
     return 0;
}

int __declspec (dllexport) function1() {
        if(IDOK != MessageBox (NULL, "test message","test title",MB_OK))
        {
        	DWORD dw = GetLastError();
	return dw;
         }
         return 0;
    }