problem with setting Top & Left of a form
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Thread: problem with setting Top & Left of a form

  1. #1
    Join Date
    May 2001
    Location
    Silicon Valley
    Posts
    109

    Exclamation problem with setting Top & Left of a form

    Colleagues,

    I’m doing some recreational programming. I'm trying to display a semi-transparent form (overlay) over a control. (The purpose of the overlay is to show that a control can be a target for drag & drop.) I’ve whipped-up a quick code to determine size and position of the overlay, and then display it. Here it is:

    Code:
            private void button1_Click(object sender, EventArgs e)
            {
                m_frmOverlay.Bounds = treeView1.RectangleToScreen(treeView1.ClientRectangle);
                m_frmOverlay.Show();
                m_frmOverlay.BringToFront();
            }
    In this code, new Bounds are set before Show(). Overlay form is displayed with default Top & Left (as set in the form designer), not the new Top & Left. Is it possible to set Top & Left before the form is shown ?
    If I change the code and set Bounds after Show(), overlay is displayed with correct top & left. Unfortunately, the overlay form still flickers for a moment at the default position. What would be a good way of getting rid of this flicker ?

    I'm using .NET 3.5 / VS 2008.

    Any suggestion, insight or reference is really appreciated!

    Cheers,
    - Nick
    Last edited by kender_a; January 23rd, 2011 at 03:21 PM.

  2. #2
    Join Date
    Jun 2008
    Posts
    2,477

    Re: problem with setting Top & Left of a form

    You need to set the StartPosition property to StartPosition.Manual before showing the form.

  3. #3
    Join Date
    May 2001
    Location
    Silicon Valley
    Posts
    109

    Resolved Re: problem with setting Top & Left of a form

    Quote Originally Posted by BigEd781 View Post
    You need to set the StartPosition property to StartPosition.Manual before showing the form.
    That solved my problem.
    Thank you, BigEd!

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