Direct3D CreateDevice

Code:

pDirect3D=Direct3DCreate9(D3D_SDK_VERSION);
		if(pDirect3D==NULL)
			{
			
			goto EXIT;
			}
	D3DPRESENT_PARAMETERS D3DPresentParams;
	
ZeroMemory(&D3DPresentParams, sizeof(D3DPRESENT_PARAMETERS));
		D3DPresentParams.Windowed=false;
		D3DPresentParams.BackBufferCount=1;
		D3DPresentParams.BackBufferWidth=800;
		D3DPresentParams.BackBufferHeight=600;
		D3DPresentParams.BackBufferFormat=D3DFMT_X8R8G8B8;
		D3DPresentParams.SwapEffect=D3DSWAPEFFECT_DISCARD;
		D3DPresentParams.hDeviceWindow=hWnd;
HRESULT hResult = pDirect3D->CheckDeviceType(D3DADAPTER_DEFAULT, D3DDEVTYPE_REF, D3DFMT_X8R8G8B8, D3DFMT_X8R8G8B8, FALSE);
if(hResult!=D3D_OK)
{
MessageBox(hWnd, L"CheckDeviceType failed!", L"", MB_OK);
goto EXIT;
}
	
 hResult = pDirect3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING,&D3DPresentParams, &pDirect3DDevice);
if(hResult!=D3D_OK)
		{
		MessageBox(hWnd, L"CreateDevice failed!", L"", MB_OK);
		goto EXIT;
		}

The display format is compatible with my system. The file compiles, but for some reason, I can NOT get the CreateDevice call to work. The DirectX pointers are declared as global variables in the program. I am using Visual Studio 2005. Just a FYI, the gotos are in there for debugging purposes. Any help is greatly appreciated.

are you linking with d3d9.lib and including d3d9.h ?
make sure d3d8.lib isnt being linked instead/also.

also, you may want to put in some error handlign code to better handle results other than DD_OK. It may be a recoverable error.

D3DERR_INVALIDCALL means one of your parameters is invalid

D3DERR_NOTAVAILABLE means your card doesnt support soem feature you asked for.

D3DERR_OUTOFVIDEOMEMORY means you dont have enough video memory to perform the action.

use a simple switch statement to report the specific error (via messagebox) to gain more insight

offhand id also suggest you change

Code:

 hResult = pDirect3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING,&D3DPresentParams, &pDirect3DDevice);

to:

Code:

 hResult = pDirect3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING,&D3DPresentParams, &pDirect3DDevice);

Some cards dont seem to like doing software vertex processing in full screen mode.

"cannot get to work" is far too vague for any kind of meaningful help. What errors are you getting? Does it compile? None of us can read minds... at least, I hope not...