Кроссплатформенный стиль кода

#ifdef _DEBUG
#define CONSOLE
#define WINDFUNC main()
#else
#define WINDOWS
#define WINDFUNC WINAPI _tWinMain(HINSTANCE hInst, HINSTANCE, LPTSTR lpCmdLine, INT iCmdShow)
#endif
 
#include "globals.h"
 
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
 
int WINDFUNC {
    std::string error = g_error + "MAIN::";
 
    WNDCLASSEX wc = { 0 };
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW);
    wc.hCursor = LoadCursor(0, IDC_ARROW);
    wc.hIcon = LoadIcon(0, IDI_APPLICATION);
    wc.hIconSm = LoadIcon(0, IDI_APPLICATION);
    wc.lpfnWndProc = WndProc;
    wc.lpszClassName = TEXT("Test");
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.hInstance = (HINSTANCE)GetModuleHandleW(0);
 
    if (!RegisterClassEx(&wc)) {
        logg.out("%s reg class", error.c_str());
        return 0;
    }
 
    HWND hwnd = CreateWindowEx(
        0,
        wc.lpszClassName,
        TEXT("Test"), WS_OVERLAPPEDWINDOW,
        800, 100,
        500, 500,
        0, 0, wc.hInstance, 0
    );
    if (!hwnd) {
        logg.out("%s create window", error.c_str());
        return 0;
    }
 
    ShowWindow(hwnd, SW_SHOW);
    UpdateWindow(hwnd);
 
    MSG msg;
    while (GetMessage(&msg, 0, 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;
 
    default: return DefWindowProc(hwnd, msg, wparam, lparam);
    }
    return 0;
}

#include <glad/glad.h>
#include <GLFW/glfw3.h>
 
int main()
{
    // Initialization
    glfwInit();                     // Initialize the GLFW library
                                    // Create a window
    GLFWwindow *window = glfwCreateWindow(256, 256, "Empty Window", nullptr, nullptr);
    glfwMakeContextCurrent(window); // Create OpenGL context for drawing
    gladLoadGL();                   // Initialize the GLFW library
 
    glClearColor(0.2f, 0.3f, 0.3f, 1.0f); // Set a color for clearing a canvas
 
    // Run the render loop
    while (!glfwWindowShouldClose(window))
    {
        // Check if any events have been activiated
        // (key pressed, mouse moved etc.) and call
        // corresponding response functions
        glfwPollEvents();
 
        glClear(GL_COLOR_BUFFER_BIT);   // Clear the canvas with the color
        glfwSwapBuffers(window);        // Swap the front and back buffer
    }
 
    // Destroy all GLFW library things: windows and so on
    glfwTerminate();
 
    return 0;
}