bool InitD3D(HWND *hWnd, HINSTANCE hInst, bool Windowed)
{
WNDCLASSEX wndclass;
wndclass.cbSize         = sizeof(wndclass);
wndclass.style          = CS_HREDRAW | CS_VREDRAW | CS_OWNDC | CS_DBLCLKS;
wndclass.lpfnWndProc    = MsgProc;
wndclass.cbClsExtra     = 0;
wndclass.cbWndExtra     = 0;
wndclass.hInstance      = hInst;
wndclass.hIcon          = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor        = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground  = (HBRUSH)(COLOR_WINDOW);
wndclass.lpszMenuName   = NULL;
wndclass.lpszClassName  = TEXT("SampleClass");
wndclass.hIconSm        = LoadIcon(NULL, IDI_APPLICATION);
// register the window class
if ( RegisterClassEx( &wndclass ) == 0 )
{
MessageBox(NULL,"could not register the window class","error",MB_OK);
return false;
}
// create new window
if (Windowed == true)
*hWnd = CreateWindowEx( NULL, TEXT("SampleClass"), TEXT("Game"),WS_OVERLAPPEDWINDOW | WS_VISIBLE,GetSystemMetrics(SM_CXSCREEN)/2 - 250,GetSystemMetrics(SM_CYSCREEN)/2 - 187,500,375,NULL,NULL,hInst,NULL );
else
*hWnd = CreateWindowEx( NULL, TEXT("SampleClass"), TEXT("Game"),NULL,0,0,0,0, NULL, NULL, hInst, NULL );
		
if (!hWnd)
{
MessageBox(NULL,"unable to create hwnd","error",MB_OK);
return false;
}

D3DPRESENT_PARAMETERS PP;
memset(&PP,0,sizeof(D3DPRESENT_PARAMETERS));
if ( !(D3DObject = Direct3DCreate9(D3D_SDK_VERSION))) 
{
MessageBox(NULL,"unable to create D3DObject","error",MB_OK);
return false;
}

if (Windowed == true)
{
PP.BackBufferWidth  = GetSystemMetrics(SM_CXSCREEN);
PP.BackBufferHeight = GetSystemMetrics(SM_CYSCREEN);
}
else
{
PP.BackBufferWidth = 1024;
PP.BackBufferHeight = 768;
}
		
// misc parameters 
PP.Windowed           = Windowed;
PP.hDeviceWindow      = *hWnd;
PP.SwapEffect         = D3DSWAPEFFECT_DISCARD;
PP.MultiSampleType    = D3DMULTISAMPLE_NONE;
PP.BackBufferCount    = 1;
		
// depth- and stencil- buffer
PP.EnableAutoDepthStencil = true;
PP.AutoDepthStencilFormat = D3DFMT_D24S8; //depth stencil
PP.BackBufferFormat       = D3DFMT_X8R8G8B8;
		
HRESULT Error;
if(FAILED( Error = D3DObject->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,NULL,D3DCREATE_MIXED_VERTEXPROCESSING,&PP,&D3DDevice)))
{
if ( Error == D3DERR_INVALIDCALL)
MessageBox(NULL,"unable to use mixed rendering, Invalid Call; attempting to use hardware rendering","error",MB_OK);
if ( Error == D3DERR_NOTAVAILABLE)
MessageBox(NULL,"unable to use mixed rendering, Not Available; attempting to use hardware rendering","error",MB_OK);
if ( Error == D3DERR_OUTOFVIDEOMEMORY)
MessageBox(NULL,"unable to use mixed rendering, Out of video memory; attempting to use hardware rendering","error",MB_OK);
if(FAILED( Error = D3DObject->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_REF,NULL,D3DCREATE_HARDWARE_VERTEXPROCESSING,&PP,&D3DDevice)))
{
if ( Error == D3DERR_INVALIDCALL)
MessageBox(NULL,"unable to use hardware rendering, Invalid Call; attempting to use software rendering","error",MB_OK);
if ( Error == D3DERR_NOTAVAILABLE)
MessageBox(NULL,"unable to use hardware rendering, Not Available; attempting to use software rendering","error",MB_OK);
if ( Error == D3DERR_OUTOFVIDEOMEMORY)
MessageBox(NULL,"unable to use hardware rendering, Out of video memory; attempting to use software rendering","error",MB_OK);
if(FAILED( Error = D3DObject->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_REF,NULL,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,&PP,&D3DDevice)))
{
if ( Error == D3DERR_INVALIDCALL)
MessageBox(NULL,"unable to use software rendering, Invalid Call; exiting application","error",MB_OK);
if ( Error == D3DERR_NOTAVAILABLE)
MessageBox(NULL,"unable to use software rendering, Not Available; exiting application","error",MB_OK);
if ( Error == D3DERR_OUTOFVIDEOMEMORY)
MessageBox(NULL,"unable to use software rendering, Out of video memory; exiting application","error",MB_OK);
return false;
}
}
}
return true;
}