>Alex,
>Thank you for the suggestion. I thought about When event but I would like to gray out the combo box when user clicks in it (to clearly indicate that editing is not allowed). Got Focus and Lost Focus work for all other controls but combo. I don't think you can gray out the control in When event.

Hi Dmitry,

What is the condition, that trigers whether your combo should be enabled or disabled? Could you set it from the form's level instead?