How Can I Prevent a Notification Form from Stealing Focus?

Avoiding Focus Issues with Notification Forms

Displaying notifications via forms can sometimes lead to unwanted focus changes, interrupting the main application's flow. This typically occurs when using the standard Show() method.

The solution involves modifying the notification form's behavior to prevent focus acquisition. This can be achieved by overriding the Form.ShowWithoutActivation property within your notification form class:

<code class="language-csharp">protected override bool ShowWithoutActivation
{
  get { return true; }
}</code>

Setting this to true stops the form from activating and grabbing focus upon appearance.

Further, to completely disable user interaction, override the CreateParams property:

<code class="language-csharp">protected override CreateParams CreateParams
{
  get
  {
    CreateParams baseParams = base.CreateParams;
    baseParams.ExStyle |= WS_EX_NOACTIVATE | WS_EX_TOOLWINDOW;
    return baseParams;
  }
}</code>

This utilizes the WS_EX_NOACTIVATE and WS_EX_TOOLWINDOW extended styles to prevent activation and treat the form as a tool window, respectively.

By implementing these overrides, your notifications will display without interfering with the main application's user interface, creating a smoother, less disruptive user experience.

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