无限窗口消息循环 [英] Infinite windows message loop

问题描述

我的程式中有这个讯息循环：

I have this message loop in my program:

while (true) {
    if (PeekMessage(&msg, window, 0, 0, PM_REMOVE)) {
        if (msg.message == WM_QUIT) {
            MessageBox(NULL, L"Quit", L"", 0);
            break;
        }
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    } else {
        Render();
    }
}

此循环永远不会结束。即使主窗口消失，它也不会显示消息框。
这是WndProc代码：

This loop never ends. It never displays the message box even though main window disappears. Here is the WndProc code:

switch (msg) {

    case WM_CLOSE :
        DestroyWindow(hwnd);
        break;

    case WM_DESTROY :
        PostQuitMessage(0);
        break;

    default :
        return DefWindowProc(hwnd, msg, wParam, lParam);
        break;
}

return 0;

有人可以帮助我吗？

推荐答案

正在调用 PeekMessage（& msg，window ，...）。如果 window 不是 NULL ，你永远不会得到 WM_QUIT WM_QUIT 与窗口没有关联。

You're calling PeekMessage(&msg, window, ...). If window isn't NULL, you'll never get WM_QUIT, because WM_QUIT is not associated with a window.

而是调用 PeekMessage / GetMessage 与 NULL HWND 。 DispatchMessage 将根据需要将其发送到右侧 WndProc 。 （一般来说，制作 GetMessage / PeekMessage 过滤器 HWND 是一个坏主意）

Instead, just call PeekMessage/GetMessage with a NULL HWND. DispatchMessage will send it to the right WndProc as necessary. (In general, making GetMessage/PeekMessage filter by HWND is a bad idea.)

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