Flex grid control

Let say i have a cell that has that line of coding:

.ColComboList(.Col) = "..."
.ColEditMask(.Col) = DDMMYYYY

That allows you to enter a date by pressing a small button "...".

when pressing a button, a calendar appears and lets you select a date.

My problem is that i'me not able to enter any text in that particular column, it is lock because of that line:

.ColComboList(.Col) = "..."

I know that you can't enter text in a listBox but there most be a way to do so.

I want to be able to enter a date manually and if the user wants to use the calendar, he can do so.

Please help