Checks to see if its first argument is an empty value. If the value isn't an empty value it is returned as-is, otherwise a secondary value is returned.
IfEmpty([Primary Value], [Alternative Value])
Primary Value is the value that should be tested.
Alternative Value is the value which will be returned if the first value is empty.
|IfEmpty(ColorReturn,"Red")||Will return "Red" when the value coming from the control Color is empty.|