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I have Windows Application form I need to hide Form on form_Load event and it should be hidden from task bar and also from task switcher (i.e. when I press Alt + Tab). means it would not be showing anywhere .

vyas karnav kumar
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    if you don't want the user to interact with it, why not just create a console application instead of a windows form? – user1666620 Jan 13 '16 at 10:24
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    Possible duplicate of [Hiding forms on startup: why doesn't this.Hide() hide my form?](http://stackoverflow.com/questions/3769337/hiding-forms-on-startup-why-doesnt-this-hide-hide-my-form) – user1666620 Jan 13 '16 at 10:26

1 Answers1

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So you should try this:

public void Form1_Load(object sender, EventArgs e)
{
    ShowInTaskbar = false;
    Hide();
}

ShowInTaskbar indicates wether your Form should appear in the task bar.

To hide it from Alt+Tab I found this solution on StackOverflow:

protected override CreateParams CreateParams
{
    get
    {
        var Params = base.CreateParams;
        Params.ExStyle |= 0x80;
        return Params;
    }
}

Simply overwrite the CreateParams property of your Form as shown above.

UPDATE The order of events when opening a Form leads to the problem that your visibility is restored after the Load event. So you will need to overwrite something like this:

protected override void OnShown(EventArgs e)
{
    base.OnShown(e);
    // if you still want to hide
    Hide();
}
Community
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René Vogt
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  • its working but form is still showing on main window. – vyas karnav kumar Jan 13 '16 at 10:51
  • @vyaskarnavkumar So @user1666620 was right. Your solution lies in this answer: http://stackoverflow.com/a/8549250/5528593 Some framework code tries to keep you `Visible`, so with this overridden `OnVisibleChanged` the above code will work. – René Vogt Jan 13 '16 at 10:58