I use the tabs on NUIDocument to display various elements on the meringue and WinForm UserControl as follows:

private static NUIDocument ShowDoc(Form DocForm, string Title, string Key, int Index)
{
DocForm.TopLevel = false;
DocForm.FormBorderStyle = FormBorderStyle.None;
DocForm.ShowIcon = false;
DocForm.ShowInTaskbar = false;
DocForm.Dock = DockStyle.Fill;
DocForm.Show();

NUIDocument doc = new Nevron.UI.WinForm.Controls.NUIDocument();
doc.Client = DocForm;
doc.Text = title;
doc.Key = Key;
doc.ImageIndex = Index;

DockMng.DocumentManager.AddDocument(doc);
return doc;
}

This works fine, help with:

1. Is this correct?
2. As with inside DocForm (Form) with reference to the parent NUIDocument properly close a tab that we have created.

This decision was also, but the Form and UserControl like so that they can design in the designer.
If I do not got it wrong, then the problem remains the same.

My task - to place on the Form or Panel button with the action of "Close", which should properly close NUIDocument which is this component!
As an interim, I call the "NUIDocument". Host.Destroy () and the tab is closed, but it is barbarism, and as I understand the consequences.
As with reference to NUIDocument properly close it, ie as gross pressed the "cross" in the row of tabs with titles of documents.

Pavel.