Problem with showing form with small size.

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Problem with showing form with small size.

I have a problem with showing small form – I want the form to be in size (5,100) but when I’m trying to show it the form size is bigger then I want. My code:

Form form = new Form();
form.StartPosition = FormStartPosition.Manual;
form.ShowInTaskbar = false;
form.FormBorderStyle = FormBorderStyle.None;
form.Size = new Size(5, 100);
form.MaximumSize = new Size(5, 100);
form.Show();
// form.Size = new Size(5, 100); - works but with flicker


I can change size after showing the form but then I have flicker.

What can I do


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Problem with showing form with small size.

  • Tippy

    Use that code in onpaint event

    this.Width=100;

    this.Height=5;

    so it'll stay in same size..

  • SkyHighRanks

    Try overriding OnSizeChanged, and examining the stack trace when it gets called. Something is changing the size of your form during the process of making it visible, which is overriding the size you set (5,100).

  • Questa

    I have the same problem
    I've disabled almost everything(minimize,maximize buttons,etc.) but the result was the same...

    Does anyone know the answer

  • sillywilly78

    If you are using franework V2 you can set the FormBorderStyle property to 'FixedToolWindow' as follows...

    Form form = new Form();

    form.StartPosition = FormStartPosition.Manual;
    form.ShowInTaskbar = false
    form.FormBorderStyle = FormBorderStyle.FixedToolWindow
    form.Size = new Size(5, 100);
    form.MaximumSize = new Size(5, 100);
    form.Show();

    // form.Size = new Size(5, 100); - works but with flicker

    The 'Size' property then works as for any control.

    At this small size you propbably want to hide the control box (minimize maximize etc..) as well i.e.

    form.ControlBox = false

    Hope this helps.



  • Tim Lensen

    After chasing this up, it appears that when the Form is getting created by Windows, its size is updated to be greater than or equal to SystemInformation.MinimumWindowSize. There doesn't seem to be a way to prevent this from happening, however, as tehlike stated, if you override OnPaint and set the size in that, it 'seems' to work:



    protected override void OnPaint(PaintEventArgs e)
    {
    this.Size = new Size(5, 100);
    base.OnPaint(e);
    }



  • Problem with showing form with small size.
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