父组件显示在子窗体上
我一直在关注以下页面，以便获得一个子表单，我可以单击其组件（例如编辑）并获得适当的焦点：
现在的问题是父表单上的组件显示在顶部子表单的。如果我对这些组件使用 SendToBack() 命令，它们就会完全消失。以下是所发生情况的屏幕截图：
编辑：
我有一个带有按钮的表单和一个显示客户信息的 ListView。当我单击某个客户端时，我可以单击一个按钮来查看或编辑该客户端，或者添加一个新客户端。编辑/添加会弹出一个表单，我可以在其中输入信息并保存。我为每个具有 SetFocus() 的编辑使用 OnClick 事件。这将焦点集中在每个编辑上，但随后所有文本都被选中，因此我无法单击该行并开始编辑文本 - 它只会覆盖，除非我先使用箭头。
最初，我使用常规表单，这就是我遇到的焦点问题。 MDI 修复了这个问题，但现在父组件显示在子组件之上。
I've been following the below page in order to have a child Form that I can click on its components (such as an edit) and have proper focus:
Working with MDI Forms in Delphi
The problem now is that the components on the parent Form show on top of the child Form. If I use the SendToBack() command for those components, they completely disappear. Here is a screenshot of what happens:
EDIT:
I have a Form with buttons and a ListView that displays client info. When I click on a client, I can click a button to view or edit that client, alternatively add a new one. The Edit/Add pops up a Form where I can input the info and save it. I'm using an OnClick event for each Edit that has a SetFocus(). That gets focus on each Edit, but then all the text is selected, so I cannot click on the line and start editing text - it just overrides unless I use an arrow first.
Initially, I used regular Forms and that's where I had the focus issue. MDI fixed that, but now it's the parent components that show on top of the child.
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关于 MDI 形式：这就是 MDI 的工作原理。主窗体除了菜单栏和可选的工具栏（可选）之外不应有任何其他内容，并与
alTop对齐。子窗体使用其余空间。正如@RemyLebeau 建议的那样，如果对齐它们，您也可以添加其他控件。但事实证明，使用普通辅助表单的实际问题是，当您通过单击按钮将焦点设置到编辑控件时，辅助表单上的编辑控件中的文本将被选中。在将焦点设置到编辑控件后，这很容易更改：
Concerning MDI forms: that is how MDI works. The main form is not supposed to have anything else than a menu bar and optionally a toolbar, aligned
alTop. The child forms use the rest of the space. Well as @RemyLebeau suggested, you can add other controls too, if you align them.But it turned out that the actual problem with using ordinary secondary forms was that the text in an edit control on the secondary form becomes selected when you set focus to the edit control in a button click. That is easy to change, right after you set the focus to an edit control: