CODEWITHSUNDEEP
c#winformsalt-tab
user1306322
user1306322

Reputation: 8721

Why does one form disappear from Alt-Tab list and the other doesn't?

I'm trying to find a way to hide the main form of my app from Alt-Tab list after minimizing it. So far I found that setting form style to SizableToolWindow does the trick, but this seems like an improper solution.

I have two winform apps. One of them is supposed to only have tray icon visible, but it still has the main form. Alt-Tab visibility problem is resolved there by doing this.Hide() in Form_Shown method. The other app does not have Form_Shown, but it has Form1_SizeChanged method with code:

this.Hide();
this.ShowInTaskbar = false;

…and for some reason it does not result in the same as the first app. I could only hide it from Alt-Tab list by also setting the main form's style to SizableToolWindow. While it's working, I'd like to know why the supposedly proper approach does not.

Upvotes: 1

Views: 339

Answers (1)

user1306322
user1306322

Reputation: 8721

Putting this.ShowInTaskbar = false before this.Hide() should hide the form from Alt-Tab list. Apparently, you have to set the visibility option before hiding the form, or it will not hide the window from Alt-Tab. With this there is no need to set the form style to ToolWindow. As for the "why", I have no idea.

Upvotes: 1

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