Problem solved, first thanks to Hans Passant for the TopLevel tip.
After removing from the docking container, just set TopLevel to true!
Here is the test code:
using System;
using System.Drawing;
using System.Windows.Forms;
using Crom.Controls.Docking;
namespace DockingTester
{
public partial class Form1 : Form
{
private Form dummyForm;
private readonly Guid dummyFormGuid = Guid.NewGuid();
public Form1()
{
InitializeComponent();
CreateDummyForm();
this.dummyForm.Show();
}
private void CreateDummyForm()
{
dummyForm = new Form();
this.dummyForm.Text = "Dummy docking test form";
}
private static void DockUndockForm(DockContainer dockContainer, Form form, Guid guid)
{
DockableFormInfo formInfo = dockContainer.GetFormInfo(guid);
//Add
if (formInfo == null)
{
formInfo = dockContainer.Add(form, zAllowedDock.All, guid);
dockContainer.DockForm(formInfo, DockStyle.Left, zDockMode.Inner);
}
//Remove
else
{
Form dummy = formInfo.DockableForm;
dockContainer.Undock(formInfo, new Rectangle(Point.Empty, new Size(100, 300)));
dockContainer.Remove(formInfo);
dummy.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Sizable;
dummy.TopLevel = true;
}
}
private void dockUndockButton_Click(object sender, EventArgs e)
{
if (this.dummyForm.IsDisposed)
CreateDummyForm();
DockUndockForm(this.dockContainer1, this.dummyForm, this.dummyFormGuid);
}
}
}