z-order <definition> # defActiveXControl T 99758 $ ActiveX control <definition> # defActiveXObject T 105585 $ ActiveX object <definition> $ dynamic data exchange (DDE) <definition> # defDDE T 21402 $ dynamic-link library (DLL) <definition> # defDLL T 21403 # defUnicode T 80706 $ Unicode <definition> $ watch expression <definition> # defWatchExpression T 22140

The visual layering of controls on a form along the form's z-axis (depth). The z-order determines which controls are in front of other controls.