c++ - 创建的窗口没有标题

Question

<分区>

Answer 1

我正在按照评论的建议发布问题的答案: 答案是要完成窗口创建，传递给 RegisterClass WINAPI 的 pWndProc 必须处理默认消息(特别是操作系统消息)。 在 CreateWindow 执行期间(调用开始后返回之前)，pWndProc 函数已经收到它必须处理的消息，在我的例子中它没有处理它们。 这是一个标准的 pWndProc 函数:

LRESULT CALLBACK pWndProc(HWND hwnd,            // Handle to our main window
    UINT Msg,             // Our message that needs to be processed
    WPARAM wParam,        // Extra values of message 
    LPARAM lParam)        // Extra values of message
{
        switch (Msg)

        {
    case WM_DESTROY: 
...
    default:
        return DefWindowProc(hwnd, Msg, wParam, lParam);
         }
}

来源:

A window procedure does not usually ignore a message. If it does not process a message, it must send the message back to the system for default processing. The window procedure does this by calling the DefWindowProc function, which performs a default action and returns a message result. The window procedure must then return this value as its own message result. Most window procedures process just a few messages and pass the others on to the system by calling DefWindowProc.