为什么我的简单 C++ Windows.h 窗口如此滞后？

jwe*_*rek 8

它很慢，因为每次您的窗口字段消息时您都在创建一个窗口

LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
    case WM_CLOSE:
        DestroyWindow(hWnd);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
        break;
    }
    
    ///////////// This should not be here .....
    textfield = CreateWindowW(L"STATIC", L"Text is here", 
        WS_VISIBLE | WS_CHILD | WS_BORDER, 20, 20, 300, 25, hWnd, NULL, NULL, NULL);
    /////////////

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

您希望创建标签一次，而不是每次调用窗口过程。一个好地方是在WM_CREATE处理程序中，即

LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
    case WM_CREATE:
        textfield = CreateWindowW(L"STATIC", L"Text is here", WS_VISIBLE | WS_CHILD | WS_BORDER, 20, 20, 300, 25, hWnd, NULL, NULL, NULL);
        return 0;
    case WM_CLOSE:
        DestroyWindow(hWnd);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
        break;
    }

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