Layer position of an object. When two objects overlap, WdgZOrder specifies the order in which they are “layered”. The object with the higher or highest number is on “top”.
The Structure Chart of the Screen Painter displays the relative Z-order of all objects in the form or display.
The Z-order of an object can be changed by dragging the object from its current position in the structure to a new position and releasing it.
FObjects closer to the bottom of the Structure Chart are displayed on top of objects closer to the top of the Chart.