# Tutorial 04 - Rendering to texture In this tutorial we will learn how to use render targets. First, we declare the variables to handle the render target and the sprite that we will associate with it:
    hgeSprite*   tar;

    HTARGET      target;
When the application loses focus, the render target's texture handle may change. So, we write the focus gain function in which we obtain the new render target's texture:
    bool FocusGainFunc()
    {
      if(tar && target)
           tar->SetTexture(hge->Target_GetTexture(target));

      return false;
    }
In the RenderFunc we first render all our stuff onto the texture, specifying our render target in the Gfx_BeginScene call:
      hge->Gfx_BeginScene(target);
      hge->Gfx_Clear(0);
      par->Render();
      spr->Render(x, y);
      hge->Gfx_EndScene();
Then we render several instances of the texture to the screen:
      hge->Gfx_BeginScene();
      hge->Gfx_Clear(0);

      for(i=0;i<6;i++)
      {
        tar->SetColor(0xFFFFFF | (((5-i)*40+55)<<24));
        tar->RenderEx(i*100.0f, i*50.0f, i*M_PI/8, 1.0f-i*0.1f);
      }

      fnt->printf(5, 5 ,HGETEXT_LEFT, "dt:%.3f\nFPS:%d",
                  hge->Timer_GetDelta(), hge->Timer_GetFPS());
      hge->Gfx_EndScene();
In the WinMain function we attach our focus gain function:
      hge->System_SetState(HGE_FOCUSGAINFUNC, FocusGainFunc);
Then, after HGE initiation, we create a render target and a sprite that we will use to make rendering of the created texture easier:
        target=hge->Target_Create(512,512,false);

        tar=new hgeSprite(
               hge->Target_GetTexture(target),0,0,512,512);
        tar->SetBlendMode(
               BLEND_COLORMUL | BLEND_ALPHAADD | BLEND_NOZWRITE);
During shutdown we delete the sprite that we used to render the generated texture and the render target itself:
        delete tar;
        hge->Target_Free(target);
The rest of shutdown process is identical to the one demonstrated in previous tutorials. The complete source code with detailed comments for this tutorial you may find in the folder tutorials\tutorial04. The required media files you'll find in the folder tutorials\precompiled.