From VFP help :
"Also, CTRL+0 is supported in ON KEY LABEL in Visual FoxPro, allowing you to redefine the key combination used to enter a null value into a field."

"Using NULL in Values and Expressions
In Visual FoxPro, you assign the null value programmatically with the .NULL. token or interactively with CTRL+0 in a field. "

Cetin


>Thanks I just tried it and in my auto complete combo where I replace the ID as soon as I keypress, failed but this is any idea I will work on as it is, I hope, default VFP behaviour.
>
>>>Hi all
>>>
>>>I have this form with a cbo. This cbo is allowed to remain empty. If the user moves forward without modifying then alls well.
>>>
>>>Now supposing the user makes a selection and then he doesn't want it, how can he undo his selection. This cbo is connected to a lookup master database, as soon as the selection is made the FK in this table is updated with the PK from the lookup master.
>>>
>>>Except reverting changes is there any solution. Please advise.
>>
>>As an addition to Alex and David, Ctrl+0 'zero' unselects.
>>Cetin