Form changes size between constructor exit and begining of Load C#

Question

Hi, I am rather baffled at the moment, I have a form which I show as a dialog (although non dialog is the same) in response to a menu item click.

    var createUser = new FrmCreateUser();
    createUser.ShowDialog();

Somewhere between the constructor exiting, and when the load event is fired the size is being changed.

I have overloaded WndProc in the 'parent' form, although it just falls though to the base implementation so I find it hard to believe that's the cause.

    protected override void WndProc(ref Message m)
 {
  if (m.Msg == (int)WindowsMessages.WM_SYSCOMMAND)
  {

   if (m.WParam.ToInt32() == (int)WindowsMessages.SC_MINIMIZE)
   {
    foreach (Form f in Application.OpenForms)
     if (f != this)
      f.Hide();

   }
   else if (m.WParam.ToInt32() == (int)WindowsMessages.SC_RESTORE)
   {
    foreach (Form f in Application.OpenForms)
     if (f != this && f.GetType() != typeof (Controls.DockLocation) )
      f.Show();
   }
  }

  base.WndProc(ref m);
 }

I can restore the size to what is should be in the load event handler, but I remain confused as to the cause.

    private void FrmCreateUser_Load(object sender, EventArgs e)
 {
  Size = new Size(RestoreBounds.Width, RestoreBounds.Height);
 }

If anyone can shed some light on this it would be much appreciated.

---

Edit

Removing the WndProc override has no effect.

SizeChanged is only invoked once (inside the createUser.ShowDialog() call) which occurs before OnHandleCreated(EventArgs e) is called.

Edit 2

Here are some pictures to show the effect.

designer:

runtime:

Answer 1

I found it - much by a happy fluke of where the PropertyGrid positioned itself as to anything else. StartPosition had been set to WindowsDefaulBounds rather than the default of WindowsDefaultLocation.