WIN API Unhandled exception

Добрый день. Недавно начал изучать WIN API по учебнику 2006 года(лучше не нашел). были несоответствия, но пока все выруливал. Вот исходник программы

Code:

#include <windows.h>
#include <windowsx.h>
#include <commctrl.h>
#include "resource.h"
#pragma comment(lib, "comctl32.lib")

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
BOOL OnCreate(HWND, LPCREATESTRUCT);
void OnCommand(HWND,int,HWND,UINT);
void OnPaint(HWND);
void OnRButtonDown(HWND,BOOL,int,int,UINT);
int is_red = 0;
HINSTANCE hI;
HBRUSH hRedBrush, hGreenBrush;
MSG msg;

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR lpCmdLine, int nCmdShow)
{
	HWND hwnd;
	WNDCLASSEX wc;
	hI = hInst;

	memset(&wc,0,sizeof(wc));
	wc.hInstance = hInst;
	wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);
	wc.hIcon = LoadIcon(NULL, IDI_HAND);
	wc.lpfnWndProc = WndProc;
	wc.lpszClassName = L"MainWindow";
	wc.style = CS_HREDRAW|CS_VREDRAW;
	wc.lpszMenuName = MAKEINTRESOURCE(IDR_MENU1);
	wc.hIconSm = LoadIcon(hInst, IDI_APPLICATION);
	wc.cbSize = sizeof(wc);
	RegisterClassEx(&wc);
	hwnd = CreateWindow(L"MainWindow",L"Окно пользователя",WS_OVERLAPPEDWINDOW,100,100,500,300,HWND_DESKTOP,NULL,hInst,NULL);
	ShowWindow(hwnd,nCmdShow);
	UpdateWindow(hwnd);

	while(GetMessage(&msg,NULL,0,0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return 0;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch(msg)
	{
	case WM_DESTROY: PostQuitMessage(0);
		             break;
	HANDLE_MSG(hwnd,WM_COMMAND,OnCommand);
	HANDLE_MSG(hwnd,WM_PAINT,OnPaint);
	HANDLE_MSG(hwnd,WM_RBUTTONDOWN,OnRButtonDown);
	HANDLE_MSG(hwnd,WM_CREATE,OnCreate);
	default: return DefWindowProc(hwnd, msg, wParam, lParam);
	}
	return 0;
}

void OnPaint(HWND hwnd)
{
	PAINTSTRUCT ps;
	HDC hdc = BeginPaint(hwnd,&ps);
	if(is_red==1)
		FillRect(hdc,&ps.rcPaint,hRedBrush);
	else if(is_red==2)
		FillRect(hdc,&ps.rcPaint,hGreenBrush);
	EndPaint(hwnd,&ps);
}

void OnCommand(HWND hwnd, int id, HWND, UINT)
{
	switch(id)
	{
	case ID_MAIN_ONE: is_red = 1;
		              InvalidateRect(hwnd,NULL,TRUE);
		              break;
        case ID_MAIN_TWO: is_red = 2;
		              InvalidateRect(hwnd,NULL,TRUE);
		              break;
        case ID_MAIN_THREE: DestroyWindow(hwnd);
		              break;
	}
}

BOOL OnCreate(HWND hwnd, LPCREATESTRUCT)
{
	hGreenBrush = CreateSolidBrush(RGB(100,255,100));
	hRedBrush = CreateSolidBrush(RGB(255,100,100));
	TBBUTTON tbb[3];
	ZeroMemory(&tbb, sizeof(tbb));
	for(int i=0;i<sizeof(tbb)/sizeof(TBBUTTON);i++)
	{
		switch(i)
		{
		case 0: tbb[i].idCommand = ID_MAIN_ONE;
			    break;
		case 1: tbb[i].idCommand = ID_MAIN_TWO;
			    break;
		case 2: tbb[i].idCommand = ID_MAIN_THREE;
				break;
		}
		tbb[i].fsState = TBSTATE_ENABLED;
		tbb[i].iBitmap = i;
	}
	CreateToolbarEx(hwnd,WS_CHILD|WS_BORDER|WS_VISIBLE,-1,3,hI,IDB_BITMAP1,tbb,3,16,16,16,16,sizeof(TBBUTTON));
	return TRUE;
}

void OnRButtonDown(HWND hwnd,BOOL , int x, int y, UINT)
{
	LPCWSTR str1 = L"Красный фон";
	LPCWSTR str2 = L"Зеленый фон";
	LPCWSTR str3 = L"Выход";
	RECT rect;

	HMENU hTrackPopup = CreatePopupMenu();
	AppendMenu(hTrackPopup,MF_STRING,ID_MAIN_ONE,str1);
	AppendMenu(hTrackPopup,MF_STRING,ID_MAIN_TWO,str2);
	AppendMenu(hTrackPopup,MF_SEPARATOR,0,NULL);
	AppendMenu(hTrackPopup,MF_STRING,ID_MAIN_THREE,str3);
	GetWindowRect(hwnd,&rect);
	TrackPopupMenu(hTrackPopup,TPM_LEFTALIGN|TPM_LEFTBUTTON,msg.pt.x,msg.pt.y,0,hwnd,NULL);
}

При запуске выскакивает окно с ошибкой:

Code:

Unhandled exception at 0x5d5c7f36 in Only_brains.exe: 0xC0000005: Access violation reading location 0x0092fffc.

Указатель ставит на строке:

Code:

hwnd = CreateWindow(L"MainWindow",L"Окно пользователя",WS_OVERLAPPEDWINDOW,100,100,500,300,HWND_DESKTOP,NULL,hInst,NULL);

Что посоветуете?