Learnin' DirectX

Hello, I'm in the process of learning DirectX 11 with the book "Beginning DirectX 11 Game Programming". I'm using Microsoft Visual Studio '10 and I'm trying to get a blank window running.

Here's the code I'm running:


#include <Windows.h>
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 );
}
return 0;
}
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 + 1 );
wndClass.lpszMenuName = NULL;
wndClass.lpszClassName = "DX11BookWindowClass";
if( !RegisterClassEx (&wndClass ) )
return -1;
RECT rc = { 0, 0, 640, 480 };
AdjustWindowRect( &rc, WS_OVERLAPPEDWINDOW, FALSE );
HWND hwnd = CreateWindowA( "DX11BookWindowClass", "Blank Win32 Window",
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left,
rc.bottom-rc.top, NULL, NULL, hInstance, NULL );
if(!hwnd)
return-1;
ShowWindow( hwnd, cmdShow );
// demo init
MSG msg = { 0 };
while( msg.message != WM_QUIT )
{
if ( PeekMessage(&msg, 00, 0, 0, PM_REMOVE) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else{
// Update
// Draw
}
}
// Demo Shutdown
return static_cast<int>( msg.wParam );
}


The error I'm receiving is: error C2440: '=' : cannot convert from 'const char [20]' to 'LPCWSTR' .
For the line: wndClass.lpszClassName = "DX11BookWindowClass";

Any ideas as to how I can fix this?