如何防止窗体在用户点击时被激活？ [英] How to prevent form from being activated when the users clicks on it?

问题描述

我有一个主窗体和非模态自动填充表单。当用户在自动填充表单中点击列表时，如何防止用户自动填充表单被激活？

所以，基本上我想要自动填充表单当用户单击时接收鼠标点击消息，但永远不会变为活动状态，因为它会导致主窗体中无法控制的第三方组件出现问题。

解决方案

覆盖表单的CreateParams方法，并将扩展样式添加到WS_EX_NOACTIVATE样式。

  procedure TForm1.CreateParams（var Params：TCreateParams）; 
开始
继承; 
 
 Params.WindowClass.ExStyle：= Params.WindowClass.ExStyle或WS_EX_NOACTIVATE; 
结束
  

（内存中编写的代码，可能包含打字错误）

I have a main form and non-modal autocomplete form. How can I prevent the autocomplete form from being activated by the user, when the user clicks on the list in the autocomplete form?

So, basically I want the autocomplete form the receive the mouse click message when the users clicks, but to never become active, because it causes problems with a third-party component in the main form over which I have no control.

解决方案

Override CreateParams method of your form and add WS_EX_NOACTIVATE style to the extended styles.

procedure TForm1.CreateParams(var Params: TCreateParams);
begin
  inherited;

  Params.WindowClass.ExStyle := Params.WindowClass.ExStyle or WS_EX_NOACTIVATE;
end;

(code written from memory, might contain typos)

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