ToolStripDropDown - hosted control doesn't fire MouseMove event

[LuckyLuke82]

Hi,

I've implemented custom dropdown for my comboboxes, with embedded Datagridview, using ToolstripControlHost & ToolStripDropdown method. When dropdown is opened my DataGridView's MouseMove event is not working - It should move up/down to row records, simmilar to Combobox dropdown when you hover over Items.... But when I click DataGridView It's MouseMove event starts working, although focus works when dropdown is opened (I can scroll up/down in DataGridView). Here is my code:

 protected override void OnDropDown(EventArgs e)
        {
            this.DroppedDown = false;
            
            if (!My_dropdown.Visible)
            {
                   My_dropdown.Show(this, 0, this.Height);
                    ToolstripCtlHost.Control.Location = new Point(0, 0);
                    ToolstripCtlHost.Control.Focus();
                }

            }
        }

What could possibly go wrong here ?? Any help kindly appreciated !!

P.S.: Strangely all works fine when I'm filtering Datagridview from Combobox input textbox (I've set that also), but not when I open custom dropdown from OnDropDown event of combobox

[LuckyLuke82]

I still haven't found nothing to begin with, has anybody any idea ?