for( TListChild::const_iterator 
it = m_child.begin(), 
it_end = m_child.end();
it != it_end;
++it )
{
(*it)->update();
}

#ifndef NENGINE_H
#define NENGINE_H

//тут много #include

/* 35 строчка */engine::NEngine* createEngine(engine::E_DRIVER_TYPE Driver = engine::EDT_OPENGL,int Width = 640,int Height = 480,int Bits = 16 ,bool FullScreen = false);
/* 36 строчка */engine::NEngine* createEngineEx(engine::SCreationParams param_);

#endif // NENGINE_H

#include "NEngine.h"

#include "CEngine.h"

engine::NEngine* createEngine(engine::E_DRIVER_TYPE Driver,int Width,int Height,int Bits,bool FullScreen)
{
  engine::SCreationParams params;

  params.Driver = Driver;
  params.windowsize.Width = Width;
  params.windowsize.Height = Height;
  params.bits = Bits;
  params.fullscreen = FullScreen;

  return createEngineEx(params);
}

engine::NEngine* createEngineEx(engine::SCreationParams param_)
{
  return new CEngine(param_);
}

LPCWSTR str1=(LPCWSTR)"Sample string";
int i = 5;
 LPCWSTR str2[40];
LPCWSTR str3[40];
strcpy ((char *)str2,(char *)str1);
strcpy ((char *)str3,"copy successful");
MessageBox(NULL,(LPCWSTR)str3,(LPCWSTR)"sds",MB_OK);

har msgi = (char)"Exporting materials to " + (char)"Sample string";
MessageBox(NULL,(LPCWSTR)str3,(LPCWSTR)"sds",MB_OK);

Form1.h:
#include "dx.h"
#pragma once
...

CreateItem1.h:
#pragma once
...


Form1.cpp:
#include "StdAfx.h"
#include "Form1.h"
#include "CreateItem1.h"

CreateItem1.cpp:
#include "StdAfx.h"
#include "Form1.h"
#include "CreateItem1.h"

glStencilFunc(GL_ALWAYS, 1, 1);
    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE); 
  glDrawArrays(GL_TRIANGLES, 0, 3);
    
    glStencilFunc(GL_NOTEQUAL, 1, 1); 
    glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO); 
    glDrawArrays(GL_TRIANGLES, 3, 3);
    
    
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glStencilFunc(GL_EQUAL, 1, 255);
    glDrawArrays(GL_TRIANGLES, 0, 6);

    if(receiver.IsKeyDown(KEY_KEY_1))
        {
          anim =
          smgr->createFlyStraightAnimator(tube->getPosition(),
          vector3df(-85,113,0), 500, false);
          anim2 =
          smgr->createFlyStraightAnimator(tube->getPosition(),
          vector3df(-20,50,0), 500, false);
          if (anim)
          {
             tube->addAnimator(anim);
             tube->addAnimator(anim2);
             anim->drop();
             anim2->drop();
          }
           }