A Paste by Anonymous

1

// dll cpp file const char *product_name = "name"; // Change to product name // Exported proceedures __declspec(dllexport) extern "C" const char * get_product_name()     {     return product_name;     } __declspec(dllexport) extern "C"  char * get_registeration_code(const char* user, char *buffer)     {     return buffer;     } /// header loader #ifndef ___PLUGIN_H #define ___PLUGIN_H #include <windows.h> #include <string> class plugin     {     HMODULE dll;     public: bool LoadPlugin( std::string libfile )                 {                 this->dll = LoadLibrary( libfile.c_str() );                 if( !this->dll )                     {                     LPVOID lpMsgBuf;                     FormatMessage(                         FORMAT_MESSAGE_ALLOCATE_BUFFER |                         FORMAT_MESSAGE_FROM_SYSTEM |                         FORMAT_MESSAGE_IGNORE_INSERTS,                         NULL,                         GetLastError(),                         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),                         (LPTSTR) &lpMsgBuf,                         0,                         NULL );                     // Display the string...                     std::string msg;                     msg = "Error loading plugin: ";                     msg.append(libfile);                     msg.append("\nSystem Error: ");                     msg.append( std::string( (const char*)lpMsgBuf));                     // Free the buffer.                     LocalFree( lpMsgBuf );                     MessageBox( 0, msg.c_str() , "Error", MB_ICONERROR);                     return false;                     }                 this->get_registeration_code_ptr = (get_registeration_code_proc)GetProcAddress( this->dll, "get_registeration_code" );                 if( ! this->get_product_name_ptr  )                     {                     MessageBox( HWND_DESKTOP,  "Invalid plugin! cannot locate 'get_registeration_code_proc' " , libfile.c_str(), MB_ICONERROR);                     return false;                     }                                  this->get_product_name_ptr       = (get_product_name_proc) GetProcAddress( this->dll, "get_product_name" );                 if( ! this->get_product_name_ptr )                     {                     MessageBox( HWND_DESKTOP, "Invalid plugin! cannot locate 'get_product_name_ptr' " , libfile.c_str(), MB_ICONERROR);                     return false;                     }                 return true;                 }             void FreePlugin()                 {                 if( this->dll == INVALID_HANDLE_VALUE )                     {                     FreeLibrary(this->dll);                     }                 }             char* get_registeration_code(const char* user, char *buffer)                 {                 if( get_registeration_code_ptr )                     {                     get_registeration_code_ptr(user, buffer);                     }                 return buffer;                 }             const char * get_product_name(void)                 {                 if( get_product_name_ptr )                     {                     return get_product_name_ptr();                     }                 return "Uninitalized";                 }          private: typedef char * (__stdcall * get_registeration_code_proc) (const char *, char *);              typedef const char * (__stdcall * get_product_name_proc)(void);     private: get_registeration_code_proc    get_registeration_code_ptr;              get_product_name_proc          get_product_name_ptr;     public: plugin(): get_registeration_code_ptr(0), get_product_name_ptr(0)                 {// do nothing                 }     }; #endif // ___PLUGIN_H