win消息中的疑难杂症！！

只看该作者 · 2008-1-28 13:03

各位同仁：
    在看wince程序设计一书时，碰到如下问题
这函数是处理WM_CREATE消息的，如下：
LRESULT DoCreateFrame (HWND hWnd, UINT wMsg, WPARAM wParam,
                       LPARAM lParam) {
    HWND hwndCB, hwndClient;
    INT sHeight;
    LPCREATESTRUCT lpcs;

    // Convert lParam into pointer to create structure.
    lpcs = (LPCREATESTRUCT) lParam;

    // Create a command bar.
    hwndCB = CommandBar_Create (hInst, hWnd, IDC_CMDBAR);
    // Add exit button to command bar.
    CommandBar_AddAdornments (hwndCB, 0, 0);
    sHeight = CommandBar_Height (GetDlgItem (hWnd, IDC_CMDBAR));
    //
    // Create client window.  Size it so that it fits under
    // the command bar and fills the remaining client area.
    //
    hwndClient = CreateWindow (CLIENTWINDOW, TEXT (""),
                               WS_VISIBLE | WS_CHILD | WS_VSCROLL,
                               lpcs->x, lpcs->y + sHeight,
                               lpcs->cx, lpcs->cy - sHeight,
                               hWnd, (HMENU)IDC_CLIENT,
                               lpcs->hInstance, NULL);

    // Destroy frame if client window not created.
    if (!IsWindow (hwndClient))
        DestroyWindow (hWnd);
    return 0;
}
其中参数中的 LPARAM lParam 包含了一些什么信息？lpcs = (LPCREATESTRUCT) lParam;