• • 已关闭。**此问题为not reproducible or was caused by typos。当前不接受答案。

这个问题是由打字错误或无法再重现的问题引起的。虽然类似的问题在这里可能是on-topic，但这个问题的解决方式不太可能帮助未来的读者。
昨天关门了。
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预期结果：窗口应可通过X按钮关闭，并使用0% CPU：

#include <Windows.h>

LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
    case WM_CLOSE:
        PostQuitMessage(1);
        break;
    }
    return DefWindowProc(hWnd, msg, wParam, lParam);
}

int CALLBACK WinMain(
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPSTR lpCmdLine,
    int nCmdShow )
{

    //Register Window class
    const LPCWSTR pClassName = L"hw3dtutorial";
    WNDCLASSEX wc = { 0 };
    wc.cbSize = sizeof(wc);
    wc.style = CS_OWNDC;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = nullptr;
    wc.hCursor = nullptr;
    wc.hbrBackground = nullptr;
    wc.lpszMenuName = nullptr;
    wc.lpszClassName = pClassName;
    wc.hIconSm = nullptr;

    RegisterClassEx(&wc);

    //Create window instance
    HWND hWnd = CreateWindowEx(
        0,pClassName,
        L"hw3d tutorial",
        WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU,
        0, 0,
        640, 480,
        nullptr,nullptr,hInstance,nullptr
    );
    //Show... the... window
    ShowWindow(hWnd, SW_SHOW);

    MSG msg;
    BOOL gResult;
    while ( (gResult = GetMessage(&msg, nullptr, 0, 0)) > 0);
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);

        switch (gResult)
        {
        case -1:
            return -1;
            break;
        default:
            return msg.wParam;
            break;
        }
    }
    return 0;
}

实际行为：窗口挂起并占用线程。关闭按钮不起作用。