首先，确定是哪一行报错，如果是preTable.insertAfter(currentTable);这一行报错，那就很明显这个元素不存在啊。
aA window can be made a topmost window either by setting the hWndInsertAfter parameter to HWND_TOPMOST and ensuring that the SWP_NOZORDER flag is not set, or by setting a window's position in the Z order so that it is above any existing topmost windows. When a non-topmost window is ma...