*** First of all, let's rename command1 to something *** more meaningful and self documenting so we have some *** clue about what it is doing This.Parent.cmdDoSomethingSpecial.Rrefresh()And in the refresh of my command button, I would have code like this:
This.Enabled = ( < The combo box's ControlSource has a specific Value or is not empty or some other condition > )HTH