hr=g_D3D->CreateDevice(D3DADAPTER_DEFAULT, //The default adapter, on a multimonitor system                                              //there can be more than one.                           //Use hardware acceleration rather than the software renderer                          D3DDEVTYPE_HAL,                          //Our Window                          g_main_window,                          //Process vertices in software. This is slower than in hardware,                          //But will work on all graphics cards.                          D3DCREATE_SOFTWARE_VERTEXPROCESSING,                          //Our D3DPRESENT_PARAMETERS structure, so it knows what we want to build                          &d3dpp,                          //This will be set to point to the new device                          &g_d3d_device);  

   //Clear out our D3DPRESENT_PARAMETERS structure.  Even though we''re going   //to set virtually all of it members, it''s good practice to zero it out first.   ZeroMemory(&d3dpp,sizeof(d3dpp));   //Whether we''re full-screen or windowed these are the same.   d3dpp.SwapEffect     = D3DSWAPEFFECT_DISCARD; // Throw away previous frames, we don''t need them   d3dpp.hDeviceWindow  = g_main_window;  //This is our main (and only) window   d3dpp.BackBufferCount= 1;  //We only need a single back buffer   //We need a Z-Buffer so everything will be drawn properly   d3dpp.EnableAutoDepthStencil = TRUE;   d3dpp.AutoDepthStencilFormat = D3DFMT_D16;   // BackBufferWidth/Height have to be set for full-screen apps, these values are   //used (along with BackBufferFormat) to determine the display mode.   //They aren''t needed in windowed mode since the size of the window will be used.   // BackBufferFormat is the pixel format we want.  In windowed mode we use the same   //format as the desktop (which we found by using GetAdapterDisplayMode() above).   //In full-screen we need to find a pixel format we like, see find_16bit_mode()   //below for more details.   if(g_fullscreen){      d3dpp.Windowed          = FALSE;      d3dpp.BackBufferWidth   = g_width;      d3dpp.BackBufferHeight  = g_height;      d3dpp.BackBufferFormat  = find_16bit_mode();   }else{      d3dpp.Windowed          = TRUE;      d3dpp.BackBufferFormat  = display_mode.Format;   } 

// Function:find_16bit_mode// Whazzit:Tests a couple of 16-bit modes to see if they are supported.  Virtually every graphics//         card in existance will support one of these 2 formats.D3DFORMAT find_16bit_mode(void){HRESULT hr;   //First we test for R5G6B5.  All 16-bits are used in this format giving us a full 64K worth   //worth of colours   hr=g_D3D->CheckDeviceType(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,D3DFMT_R5G6B5,D3DFMT_R5G6B5,FALSE);   if(SUCCEEDED(hr)){      OutputDebugString("D3DFMT_R5G6B5\n");      return D3DFMT_R5G6B5;   }   //Next try X1R5G5B5. Since 1 bit is wasted it''s technically a 15-bit mode and only   //provides 32K colours, though you''d be hard pressed to tell the difference between   //15- & 16-bit modes.   hr=g_D3D->CheckDeviceType(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,D3DFMT_X1R5G5B5,D3DFMT_X1R5G5B5,FALSE);   if(SUCCEEDED(hr)){      OutputDebugString("D3DFMT_X1R5G5B5\n");      return D3DFMT_X1R5G5B5;   }   //This is a freaky card.  Complain and bail out.   FatalError("Couldn''t find a decent mode\n");   //Won''t actually hit this line since FatalError() kills us, but it makes the compiler happy.   return (D3DFORMAT)NULL;}