Ссылка на неразрешенный внешний символ _main в функции ___tmainCRTStartup

#include <windows.h>
#include <commctrl.h>
#include <iostream>
#include "stdafx.h"
using namespace std;
 
HWND AButton, BButton, CButton, DButton, EButton, FButton, GButton, HButton, IButton, PLUS, MINUS, MNOZENIE, DZIELENIE, NButton, Clear, Enter, hWnd;
CHAR szClassName[] = "Kalkulator";
HINSTANCE* hInst;
 
 
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
 
INT WINAPI WinMain (HINSTANCE hInstance, HINSTANCE, LPSTR lStart, INT nShow)
{
 
    hInst = &hInstance;
    WNDCLASSEX wc;
    wc.hInstance = *hInst;
    wc.lpszClassName = szClassName;
    wc.lpfnWndProc = WndProc;
    wc.style = 0;
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.hIcon = LoadIcon(0, IDI_APPLICATION);
    wc.hIconSm = LoadIcon(0, IDI_APPLICATION);
    wc.hCursor = LoadCursor(0, IDC_ARROW);
    wc.lpszMenuName = 0;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hbrBackground = (HBRUSH)COLOR_BACKGROUND;
    if (!RegisterClassEx(&wc)) return 0;
    hWnd = CreateWindowEx(0, szClassName, "Kalkulator", WS_OVERLAPPEDWINDOW, 20, 20, 600, 300, 0, 0, *hInst, 0);
    ShowWindow(hWnd, nShow);
    MSG msgs;
    while (GetMessage(&msgs, 0, 0, 0))
    {
        TranslateMessage(&msgs);
        DispatchMessage(&msgs);
    }
    return msgs.wParam;
}
 
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wPar, LPARAM lPar)
{
    switch (msg)
    {
    case WM_CREATE:
        //funkcja tworząca kontrolkę
        AButton = CreateWindowEx(0, WC_BUTTON, "1", WS_CHILD | WS_VISIBLE, 20, 20, 70, 70, hwnd, (HMENU)1, *hInst, 0);
        BButton = CreateWindowEx(0, WC_BUTTON, "2", WS_CHILD | WS_VISIBLE, 88, 20, 70, 70, hwnd, (HMENU)2, *hInst, 0);
        CButton = CreateWindowEx(0, WC_BUTTON, "3", WS_CHILD | WS_VISIBLE, 156, 20, 70, 70, hwnd, (HMENU)3, *hInst, 0);
        DButton = CreateWindowEx(0, WC_BUTTON, "4", WS_CHILD | WS_VISIBLE, 20, 87, 70, 70, hwnd, (HMENU)4, *hInst, 0);
        EButton = CreateWindowEx(0, WC_BUTTON, "5", WS_CHILD | WS_VISIBLE, 88, 87, 70, 70, hwnd, (HMENU)5, *hInst, 0);
        FButton = CreateWindowEx(0, WC_BUTTON, "6", WS_CHILD | WS_VISIBLE, 156, 87, 70, 70, hwnd, (HMENU)6, *hInst, 0);
        GButton = CreateWindowEx(0, WC_BUTTON, "7", WS_CHILD | WS_VISIBLE, 20, 155, 70, 70, hwnd, (HMENU)7, *hInst, 0);
        HButton = CreateWindowEx(0, WC_BUTTON, "8", WS_CHILD | WS_VISIBLE, 88, 155, 70, 70, hwnd, (HMENU)8, *hInst, 0);
        IButton = CreateWindowEx(0, WC_BUTTON, "9", WS_CHILD | WS_VISIBLE, 156, 155, 70, 70, hwnd, (HMENU)9, *hInst, 0);
        PLUS = CreateWindowEx(0, WC_BUTTON, "+", WS_CHILD | WS_VISIBLE, 20, 224, 70, 70, hwnd, (HMENU)9, *hInst, 0);
        MINUS = CreateWindowEx(0, WC_BUTTON, "-", WS_CHILD | WS_VISIBLE, 156, 224, 70, 70, hwnd, (HMENU)9, *hInst, 0);
        MNOZENIE = CreateWindowEx(0, WC_BUTTON, "*", WS_CHILD | WS_VISIBLE, 224, 20, 30, 110, hwnd, (HMENU)9, *hInst, 0);
        DZIELENIE = CreateWindowEx(0, WC_BUTTON, "/", WS_CHILD | WS_VISIBLE, 224, 180, 30, 114, hwnd, (HMENU)9, *hInst, 0);
        NButton = CreateWindowEx(0, WC_BUTTON, "0", WS_CHILD | WS_VISIBLE, 88, 224, 70, 70, hwnd, (HMENU)10, *hInst, 0);
        Clear = CreateWindowEx(0, WC_BUTTON, "C", WS_CHILD | WS_VISIBLE, 224, 129, 70, 60, hwnd, (HMENU)10, *hInst, 0);
        Enter = CreateWindowEx(0, WC_BUTTON, "Enter", WS_CHILD | WS_VISIBLE, 20, 292, 235, 30, hwnd, (HMENU)11, *hInst, 0);
        break;
 
    case WM_COMMAND:
        if (wPar == 1) MessageBox(hwnd, "najata", "okno", MB_OK);
    
        break;
 
 
 
 
 
    case WM_DESTROY:
        DestroyWindow(AButton);
        DestroyWindow(BButton);
        DestroyWindow(CButton);
        DestroyWindow(DButton);
        DestroyWindow(EButton);
        DestroyWindow(FButton);
        DestroyWindow(GButton);
        DestroyWindow(HButton);
        DestroyWindow(IButton);
        DestroyWindow(Clear);
        DestroyWindow(PLUS);
        DestroyWindow(MINUS);
        DestroyWindow(MNOZENIE);
        DestroyWindow(DZIELENIE);
        DestroyWindow(Enter);
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hwnd, msg, wPar, lPar);
    }
    return 0;
}