Ошибка при создании окна в Windows 10

#include <Windows.h>
#include <string>
#include "resource.h"
#include <TlHelp32.h>
#include <fstream>
#include "MemReader.h"
 
 
using namespace std;
 
 
HWND hwnd;
HINSTANCE hInstance2;
DWORD64 var;
fstream Logs;
 
LRESULT CALLBACK DS2ZERO(HWND, UINT, UINT, LONG);
 
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR cmdLine, int nCmdShow){
 
    MSG Msg;
    WNDCLASSEX WndClass;
    char name[] = "ClassName";
    hInstance2 = hInstance;
    
    WndClass.style = CS_HREDRAW | CS_VREDRAW;
    WndClass.lpfnWndProc = (WNDPROC)DS2ZERO;
    WndClass.cbClsExtra = 0;
    WndClass.cbWndExtra = 0;
    WndClass.hInstance = hInstance;
    WndClass.hIcon = LoadIcon(hInstance, IDI_APPLICATION);
    WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
    WndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    WndClass.lpszMenuName = NULL;
    WndClass.lpszClassName = name;
    WndClass.cbSize = sizeof(WNDCLASSEX);
    WndClass.hIconSm = NULL;
 
    if (!RegisterClassEx(&WndClass)){
        MessageBox(NULL, "Cant register class", "Error", MB_OK);
        exit(1);
    }
 
    HDC hDCScreen = GetDC(NULL);
    int Horres = GetDeviceCaps(hDCScreen, HORZRES);
    int Vertres = GetDeviceCaps(hDCScreen, VERTRES);
    ReleaseDC(NULL, hDCScreen);
 
    hwnd = CreateWindow(name, "DS2RANK", WS_OVERLAPPED | WS_SYSMENU, (Horres / 2) - 300, (Vertres / 2) - 300, 600, 600, NULL, NULL, hInstance, NULL);
 
    if (!hwnd){
        MessageBox(NULL, "Cant create window", "Error", MB_OK);
        exit(1);
    }
 
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
    
    while (GetMessage(&Msg, NULL, 0, 0)){
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }
 
    return Msg.wParam;
 
 
}

    if (!hwnd){
        MessageBox(NULL, "Cant create window", "Error", MB_OK);
        exit(1);
    }

LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
        case WM_DESTROY:
        {
            PostQuitMessage(0);
            return 0;
        }
    }
    return DefWindowProc(hWnd, message, wParam, lParam);
}
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASSEX wc;
    ZeroMemory(&wc, sizeof(WNDCLASSEX));
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WindowProc;
    wc.hInstance = hInstance;
    wc.hCursor = LoadCursor(0, IDC_ARROW);
    wc.lpszClassName = "WindowClass";
    RegisterClassEx(&wc);
    HWND hWnd = CreateWindowEx(0, "WindowClass", "Test", WS_SYSMENU | WS_MINIMIZEBOX,
        (GetSystemMetrics(SM_CXSCREEN) - 1024) / 2, (GetSystemMetrics(SM_CYSCREEN) - 576) / 2,
        1024, 576, 0, 0, hInstance, 0);
    ShowWindow(hWnd, nCmdShow);
    MSG msg;
    while (1)
    {
        while (PeekMessage(&msg, 0, 0, 0, 1))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        if (msg.message == WM_QUIT) break;
    }
    return (int)msg.wParam;
}