如何在Console下面生成一个WIN32窗口

一个小挑战？

VS2017里面，新建一个控制台工程，输入名字（你不需要也成，有默认的），得到一个控制台工程。

好了，生成的代码，如下：

// Win32InConsole.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include "pch.h"
#include <iostream>

int main()
{
    std::cout << "Hello World!\n";
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started:
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file

这里有一大堆的废代码，但是，我还是把它放上来了，忘了说，我的VS2017语言版本是英文版的，为什么弄英文版呢？因为我不想遇到太多的与中文与VS2017相关的麻烦，反正就是，设置为英文，好外多多，你不会动不动因为这VS的一些BUG而导致工作流中断，最后，你找来找去，才发现，原来是VS的问题。

现在上正题，代码如下：

// Win32InConsole.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include "pch.h"
#include <iostream>

#include <windows.h>
#define CLASS_NAME TEXT("First")
int NewWindow();

int main()
{
    std::cout << "Hello World!\n";
    return NewWindow();
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started:
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file

//我就不声明了，在这里直接上代码
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_DESTROY:
        PostQuitMessage(0); //一定要加啊
        break;
    default:
        break;
    }

    return DefWindowProc(hWnd, message, wParam, lParam);
}

int NewWindow()
{
    WNDCLASS ws = { 0 };
    ws.cbClsExtra = sizeof(ws);
    ws.lpfnWndProc = WndProc;
    ws.lpszClassName = CLASS_NAME;
    if (!::RegisterClass(&ws)) return -1;
    HWND hWnd = CreateWindow(CLASS_NAME, CLASS_NAME, WS_OVERLAPPEDWINDOW
        , 100, 100, 800, 600, NULL, NULL, NULL, NULL);
    if (!hWnd) return -2;

    ShowWindow(hWnd, SW_SHOW);

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

    return msg.wParam;

}

好了，事情就是这么简单！！！

附上两个图：

关闭WIN32窗口后