The Label caption property is available for all the attributes and variables in the Abstract layout whose Label position property = Left.
It allows establishing the label contents of the variable or attribute. It's a design and runtime property.
Control.Caption = Exp
Is the name of the control inserted on the Abstract layout form.
Is the text that will be displayed.
ArticleName.Caption = &value
This property is available since GeneXus X Evolution 3 Upgrade 4.