struct D3DInitialization_Destruction {
	//last 13 parameters are for D3DPRESENT_PARAMETERS
	void d3d_init (	IDirect3D9* pDObj,
			IDirect3DDevice9* pDObjDev,
			HWND hwnd,
			UINT buffW,
			UINT buffH,
			bool wind,
			D3DFORMAT buffF = D3DFMT_R8G8B8,
			UINT buffC = 1,
			D3DSWAPEFFECT swapEffect = D3DSWAPEFFECT_COPY,
			bool autoDnS = FALSE,
			D3DFORMAT autoDnSFormat = D3DFMT_UNKNOWN,
			UINT flags = 0,
			UINT FS_PresInt = D3DPRESENT_INTERVAL_DEFAULT,
			UINT FS_RefRate = D3DPRESENT_RATE_DEFAULT,
			D3DMULTISAMPLE_TYPE MST = D3DMULTISAMPLE_NONE ){

		D3DPRESENT_PARAMETERS p;
		p.BackBufferWidth = buffW;
		p.BackBufferHeight = buffH;
		p.BackBufferFormat = buffF;
		p.BackBufferCount = buffC;
		p.MultiSampleType = MST;
		p.SwapEffect = swapEffect;
		p.hDeviceWindow = hwnd;
		p.Windowed = wind;
		p.EnableAutoDepthStencil = autoDnS;
		p.AutoDepthStencilFormat = autoDnSFormat;
		p.Flags = flags;
		p.FullScreen_RefreshRateInHz = FS_RefRate;
		p.PresentationInterval = FS_PresInt;

		pDObj = Direct3DCreate9 (D3D_SDK_VERSION);
		int msg;
		msg = pDObj->CreateDevice (0, D3DDEVTYPE_HAL, hwnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &p, &pDObjDev);
		if (msg == D3D_OK)
			MessageBox (hwnd, "device created!", NULL, 0);
		else if (msg == D3DERR_NOTAVAILABLE)
			MessageBox (hwnd, "NOTAVAILABLE", NULL, 0);
		else if (msg == D3DERR_INVALIDCALL)
			MessageBox (hwnd, "INVALIDCALL", NULL, 0);
		else if (msg == D3DERR_OUTOFVIDEOMEMORY)
			MessageBox (hwnd, "OUTOFVIDEOMEMORY", NULL, 0);
		else
			MessageBox (hwnd, "unknown error", NULL, 0);
	}
}hafta;

#include <assert.h>
#include <afxwin.h>
#include "d3d9.h"
#include "init_finish.h"

//inside WinMain:
IDirect3D9* DObj = NULL;
IDirect3DDevice9* DObjDev = NULL;
hafta.d3d_init (DObj, DObjDev, hwnd, 640, 480, TRUE);