>You could have a control variable that gets set to the ActiveControl when the Form loses focus, and then sets the focus back to that control when the Form gets focus again. I *think* (not sure and don't have time to test right now), you can use the Activate/Deactivate events to do this.


Thank you. This works for normal TextBoxes. However this does not work for grids.
I tried code below for grids.
Grid in EditOnenter mode seems to destroy TextBox windows handle when it loses focus. In Re-activating calling Focus() does not have any effect: Focus() returns false since there is no handle and does not set focus.
I have some VirualMode grids in other forms which automatically restore focus. No ides why code below does not work.
How to restore current control in DataGridView ?

Probably we need to activate specific textbox in some special way, maybe
remember and set cell coordinates directly?

Andrus.

using System.Windows.Forms;
using System.Collections.Generic;

public class Test
{
    static void Main()
    {
        Application.Run(new MainForm());
    }
}

class MainForm : Form
{
    public MainForm()
    {
        WindowState = FormWindowState.Maximized;
        IsMdiContainer = true;
        Form frm = new Childform();
        frm.MdiParent = this;
        frm.Show();
        Form frm2 = new Childform();
        frm2.MdiParent = this;
        frm2.Show();
        frm2.Left = 2000;
    }
}

class Childform : Form
{
    DataGridView grid;

    public Childform()
    {
        grid = new DataGridView();
        grid.Columns.Add(new DataGridViewTextBoxColumn());
        grid.EditMode = DataGridViewEditMode.EditOnEnter;
        Controls.Add(grid);
    }


    protected override void OnClick(System.EventArgs e)
    {
        base.OnClick(e);
        grid.Focus();
    }

    protected override void OnLoad(System.EventArgs e)
    {
        base.OnLoad(e);
        grid.Focus();
    }
}