Hilfe bei D3D Devices,und Fragezu Avi

Heylo
ich bins wieder .Ich habe gerade ein Problem mit DirectX11 und ich w�rde mich freuen wen ihr mihr helfen k�nntet. Thx gibt es nat�rlich.
Error:
Spoiler
Code:
Spoiler
Main:
Code:
#include <cstdio>
#include <windows.h>
#include <D3DCommon.h>
#include <DXGI.h>
#include <D3D11.h>
#include <DXGI.h>

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam);

int WINAPI wWinMain(HINSTANCE hInstance,HINSTANCE prevInstance,LPWSTR cmdLine,int cmdShow)
{
	UNREFERENCED_PARAMETER(prevInstance);
	UNREFERENCED_PARAMETER(cmdLine);
	WNDCLASSEX wndClass={0};
	wndClass.cbSize=sizeof(WNDCLASSEX);
	wndClass.style=CS_HREDRAW|CS_VREDRAW;
	wndClass.lpfnWndProc=WndProc;
	wndClass.hInstance=hInstance;
	wndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
	wndClass.hbrBackground=(HBRUSH)(COLOR_WINDOW+3);
	wndClass.lpszMenuName=NULL;
	wndClass.lpszClassName="DirectX";
	wndClass.hIcon = LoadIcon(NULL,IDI_WINLOGO);

	if( !RegisterClassEx( &wndClass))
		return -1;
	
	RECT rc = {0, 0,1920, 1080 };
	AdjustWindowRect( &rc,WS_OVERLAPPEDWINDOW,FALSE);

	//HWND hwnd=CreateWindowA("DirectX","Zombie Survivalrun",WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,rc.right-rc.left,rc.bottom-rc.top,NULL,NULL,hInstance,NULL);
	HWND hwnd=CreateWindowA("DirectX","Zombie Survivalrun",CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,rc.right-rc.left,rc.bottom-rc.top,NULL,NULL,hInstance,NULL);
	if( !hwnd)
		return -1;
	////////////////////////////////////////////////
	//Initalisize from DirectX Driver and Lvltypes//
	////////////////////////////////////////////////
	D3D_DRIVER_TYPE driverTypes[]=
	{
		D3D_DRIVER_TYPE_HARDWARE,
		D3D_DRIVER_TYPE_WARP,
		D3D_DRIVER_TYPE_SOFTWARE
	};
	D3D_FEATURE_LEVEL featureLevels[]=
	{
		D3D_FEATURE_LEVEL_11_0,
		D3D_FEATURE_LEVEL_10_1,
		D3D_FEATURE_LEVEL_10_0,
	};
	unsigned int totalDriverTypes=ARRAYSIZE(driverTypes);
	unsigned int totalFeatureLevels=ARRAYSIZE(featureLevels);
	///////////////////////////
	//Swap Chain Beschreibung//
	///////////////////////////
	RECT dimensions;
	GetClientRect(hwnd,&dimensions);
	unsigned int width =dimensions.right-dimensions.left;
	unsigned int height=dimensions.bottom-dimensions.top;
	DXGI_SWAP_CHAIN_DESC swapChainDesc;
	ZeroMemory(&swapChainDesc,sizeof(swapChainDesc));
	swapChainDesc.BufferCount=1;
	swapChainDesc.BufferDesc.Width=width;
	swapChainDesc.BufferDesc.Height=height;
	swapChainDesc.BufferDesc.Format=DXGI_FORMAT_R8G8B8A8_UNORM;
	swapChainDesc.BufferDesc.RefreshRate.Numerator=60;
	swapChainDesc.BufferDesc.RefreshRate.Denominator=1;
	swapChainDesc.BufferUsage=DXGI_USAGE_RENDER_TARGET_OUTPUT;
	swapChainDesc.OutputWindow=hwnd;
	swapChainDesc.Windowed=true;
	swapChainDesc.SampleDesc.Count=1;
	swapChainDesc.SampleDesc.Quality=0;
	/////////////////////////////////////////////////////////
	//Erstellen von Direct3D devices,context und swap chain//
	/////////////////////////////////////////////////////////
	ID3D11Device device_;//(Error:Ein Object von Typ "ID3D11Device" einer abstrakten Klasse ist nicht zul�ssig)
	ID3D11DeviceContext d3dContext_;//(Error:Ein Object von Typ "ID3D11DeviceContext" einer abstrakten Klasse ist nicht zul�ssig)
	IDXGISwapChain swapChain_;//(Error:Ein Object von Typ "IDXGISwapChain" einer abstrakten Klasse ist nicht zul�ssig)


	ShowWindow(hwnd,cmdShow);
	MSG msg= {0};
	 
	while(msg.message!=WM_QUIT)
	{
		if(PeekMessage( &msg,0,0,0,PM_REMOVE))
		{
			TranslateMessage( &msg);
			DispatchMessage( &msg);
		}
	}
	return static_cast<int>(msg.wParam);
}
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
	PAINTSTRUCT paintStruct;
	HDC hDC;
	switch(message)
	{
		case WM_PAINT:
			hDC=BeginPaint(hwnd, &paintStruct);
			EndPaint(hwnd,  &paintStruct);
			break;
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		default:
			return DefWindowProc(hwnd,message,wParam,lParam);
	}
}