I have an UltraTextEditor with a DropDownEditorButton. That button drops down a usercontrol with a tree and some more things.

I want the following feature: When the user type a text, the control should be dropped down (if is not dropped) and the tree data should be filtered by that text. The problem comes when i drop down, because UltraTextEditor seems like lose the focus on the text. This is some of the code:

private void txtConcepto_KeyDown(object sender, KeyEventArgs e)

        {

                // This is used to filter the data on my usercontrol.

                this.ctrArbolConceptos.FiltrarConceptos(this.txtConcepto.Text);

                // The controls drop down, and i lose the focus on my text.

                if (!((DropDownEditorButton)this.txtConcepto.ButtonsRight["ddbConcepto"]).IsDroppedDown)

                    ((DropDownEditorButton)this.txtConcepto.ButtonsRight["ddbConcepto"]).DropDown();

                // If i try to manually set the focus, the dropdown is closed...

                this.txtConcepto.Focus();

        }