Owned Windows versus Child Windows

A child window is embedded in a parent window and cannot leave that display area. It is automatically moved when the parent is moved. The child window's X,Y position is relative to the parent's, rather than to the screen. Typically a child window has no frame or title, although you can configure them.

This is not true for owned windows (those with bit 15 set in their Window call).

An owned window is always layered in front of its owning window. Owned windows have no icon on the MS Taskbar. An example of an owned window is the Add Application Wizard.

Owned, caption-less windows are a common way to create pop-up (right-click) menus.