How to capture the combobox text when Lost Focus???

[thomaz]

I use the DataSource like below to fill a Combobox:

comboBox1.DataSource = dataSet1.Tables["Suppliers"];
comboBox1.DisplayMember = "ProductName";

When the user types any keyboard key i use the DROPDOWN
property, like below, to show all combobox itens:

this.comboBox1.DroppedDown = true;

I use the content of the Combobox text to update my
database.
I have a problem when the combobox lost focus, because the
combobox text is cleaned. And its impossible to update the
Database.
This only occurs when the user typing a new combobox item
in a combobox text.

If i disable the Drop Down property my code works whell.

There is a way to make the DROP DOWN property works
together the LOST FOCUS without clearing the new Combobox
Text???

Thanks...
Thomaz