C++ 为什么调用CreateWindow失败，我如何修复它？

我正在学习directx12的教程，甚至无法理解窗口D的创建：有一个已实现的错误窗口，它告诉我在创建实际要创建的窗口时出错。 这应该意味着它“没有成功地获得一个窗口句柄”。。。 我不知道这意味着什么，但是我非常感谢你的帮助

#include "stdafx.h"

//Handle to the window
HWND hwnd = NULL;

//Name of the window
LPCTSTR WindowName = L"GameEngineApp";

//Title of the window
LPCTSTR WindowTitle = L"My Game Engine";

//Width and height of the window
int Width = 800;
int Height = 600;

//Toggle for fool screen
bool FullScreen = false;

//Toggle for window creation
bool InitializeWindow(HINSTANCE hInstance,
    int ShowWnd, int width, int height, bool fullscreen);

//Main application loop
void mainLoop()
{
    //The message var hold any windows message received through the 
    //PeekMessage function
    MSG msg;
    ZeroMemory(&msg, sizeof(MSG));

    while (true)
    {
        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            //If there is a message, it is translated
            //then dispatched so Windows 
            //knows the program hasn't stopped working
            if (msg.message = WM_QUIT) {
                break;

                TranslateMessage(&msg);
                DispatchMessage(&msg);
            }
            else {
                //If there is no message the game 
                //code will run and the loop will continue
            }
        }
    }
}

//Callback function for windows messages
LRESULT CALLBACK WndProc(HWND hWnd,
    UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
    case WM_KEYDOWN:
        if (wParam == VK_ESCAPE) {
            if (MessageBox(0, L"Are you sure you want to exit?",
                L"Really?", MB_YESNO | MB_ICONQUESTION) == IDYES)
                DestroyWindow(hwnd);
        }
        return 0;

    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd,
        msg, wParam, lParam);
}

//Main Windows function
int WINAPI WinMain(HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPSTR lpCmdLine,
    int nShowCmd)
{
    //Toggle window creation
    if (!InitializeWindow(hInstance, nShowCmd, Width, Height, FullScreen))
    {
        MessageBox(0, L"Window Initialization - Failed",
            L"Error", MB_OK);
        return 0;
    }

    mainLoop(); //Call main loop to start

    return 0;
}

bool InitializeWindow(HINSTANCE hInstance,
    int ShowWnd, int width, int height, bool fullscreen)
{
    //Check if fullscreen is needed and set to fullscreen if so
    if (fullscreen)
    {
        HMONITOR hmon = MonitorFromWindow(hwnd,
            MONITOR_DEFAULTTONEAREST);
        MONITORINFO mi = { sizeof(mi) };
        GetMonitorInfo(hmon, &mi);

        width = mi.rcMonitor.right - mi.rcMonitor.left;
        height = mi.rcMonitor.bottom - mi.rcMonitor.top;
    }

    //Window class structure
    WNDCLASSEX wc;
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = NULL;
    wc.cbWndExtra = NULL;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 2);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = WindowName;
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    //Registering the window class
    if (!RegisterClassEx(&wc))
    {
        MessageBox(NULL, L"Error registering class",
            L"Error", MB_OK | MB_ICONERROR);
        return false;
    }

    //Create the window with the now registered window class
    hwnd = CreateWindowEx(NULL,
        WindowName,
        WindowTitle,
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT,
        width, height,
        NULL,
        NULL,
        hInstance,
        NULL);

    //Return error msg if unsuccessful in getting a window handle
    if (!hwnd)
    {
        MessageBox(NULL, L"Error creating window",
            L"Error", MB_OK | MB_ICONERROR);
        return false;
    }

    //Removing the style from the window when fullscreen
    if (fullscreen)
    {
        SetWindowLong(hwnd, GWL_STYLE, 0);
    }

    //Showing and updating the window
    ShowWindow(hwnd, ShowWnd);
    UpdateWindow(hwnd);

    return true;
}

我尝试将CreateWIndowEx更改为CreateWindowA，这是唯一可能产生影响的事情，但我没有看到任何结果。 我已尝试打印错误，但没有错误

---

< >用C++代码在Windows中创建窗口，这样我就可以制作一个游戏引擎。< /p> 但不要滥用全局变量。 您正在使用

hwnd

作为句柄参数，在

WndProc

中调用

DefWndProc

。但是直到

CreateWindowEx

返回时才设置，在窗口站立期间，有大量非常重要的消息被浏览

WndProc

。这些消息需要窗口句柄，而您不能传递它。相反，您只是传递

NULL

（启动值

hwnd

）

将

WndProc中的all
hwnd
更改为
hwnd
（参数名称）

---

我留下的评论中提到的其余问题供您解决。

请包括您的代码，如果没有详细说明，将很难帮助您。感谢您的快速回答！很抱歉，我正在处理它，因为我知道如何在文本框中缩进它。您的消息循环已关闭。您可能打算在WM_QUIT时中断，但您只处理WM_QUIT消息。修正大括号。投票关闭你想要的

msg.message==WM\u QUIT

至少。嘿，谢谢你的帮助，这真的成功了！我真的没有发现我在if语句中有一个输入错误，这是非常糟糕的，但是现在我必须在task manager中结束该过程才能关闭它，我不知道这是否正常，因为我相信我已经实现了一个关闭窗口的函数。