I have a combo box and its row source type is value list. The row source consist of "0","10","20","30 and "40". Is it possible to display ". Is it possible to display " as the default value when I open my form?

If you want it to display as a blank then leave the default value blank. Or add a blank to the list.

Oh sorry, there is a little typo in my question. Actually " Is it possible to display 0 as the default value when I open my form? I want the combo box to automatically show 0 when I open it. Is there is any way to do it? I tried change the default value as 0 but nothing happened.

It looks like your value list is text strings, not actually numbers, So you may need to make the default "0" or change the value list to numbers.

Thanks!