CreateFile(): ошибка "5"

#include <windows.h>
#include <stdio.h>
 
LRESULT CALLBACK MWndProc(HWND, UINT, UINT, LONG);
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdParam, int nCmdShow)
 
{
    MSG Msg;
    HWND hWnd;
    wchar_t lpszClassName[] = L"mainWin";
    WNDCLASS mw;
    mw.lpfnWndProc = MWndProc;
    mw.style = CS_HREDRAW | CS_VREDRAW;
    mw.hInstance = hInstance;
    mw.hIcon = NULL;
    mw.hCursor = LoadCursor(NULL, IDC_ARROW);
    mw.cbClsExtra = 0;
    mw.cbWndExtra = 0;
    mw.lpszClassName = lpszClassName;
    mw.lpszMenuName = L"Mymenu";
    mw.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
 
    if (!RegisterClass(&mw))
    {
        MessageBox(NULL, L"Can't register class!", L"ERROR!", MB_OK);
        return 0;
    }
    hWnd = CreateWindow(lpszClassName, L"window", (WS_OVERLAPPEDWINDOW&~WS_THICKFRAME) | WS_VISIBLE, 400, 300, 800, 500, NULL, NULL, hInstance, NULL);
    if (!hWnd)
    {
        MessageBox(NULL, L"Can't create window!", L"ERROR!", MB_OK);
        return 0;
    }
    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);
 
    while (GetMessage(&Msg, NULL, 0, 0))
    {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }
 
    return Msg.wParam;
}
LRESULT CALLBACK MWndProc(HWND hWnd, UINT Message, UINT wParam, LONG lParam)
{
    HANDLE hFile;
    DWORD error;
    static char Number[20];
    switch (Message)
    {
    case WM_CREATE:
        hFile = CreateFile(L"C://text.txt", GENERIC_READ| GENERIC_WRITE, FILE_SHARE_WRITE | FILE_SHARE_READ, NULL,
            CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
        error = GetLastError();
        sprintf_s(Number, "%d", error);
        MessageBoxA(hWnd, Number, "Info", MB_OK);
    
 
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hWnd, Message, wParam, lParam);
}