This is what i am doing.
For this application, a field can be of two types. One is a part type and this is the default. This is filled in with the default part. However, sometimes this field contains a 3 letter code..
I need to have this functionality..
If it is a part do nothing.
If it is not the part, validate it against the codes table.
I have a special grid with a property that hold the part value. This is the default for the field and is automatically filled in the when event of the text field.
In the lostfocus event of the text field, i compare the value to the stored value above and if it is the same I just pass to the next column.

If it is not, I am validating the input to the code table. This works fine if the the codes match. (pass to the next column)
However if they do not match, I am unable to get the combo box to appear and allow the user to select an item from the list. (I know it gets the focus, as I have watched it in the debugger.. however the combo is not visible)

How do activate the other control in the column.. i.e the combo box?

TIA

Mike