PowerBuilder provides the following drawing controls: Line, Oval, Rectangle, and RoundRectangle. Drawing controls are usually used only to enhance the appearance of a window or to group controls. However, constructor and destructor events are available, and you can define your own unmapped events for a drawing control. A drawing control does not receive Windows messages, so a mapped event would not be useful.
You can use the following functions to manipulate drawing controls at runtime:
Hide
Move
Resize
Show
In addition, each drawing control has a set of properties that define its appearance. You can assign values to the properties in a script to change the appearance of a drawing control.
Never in front
You cannot place a drawing control on top of another control
that is not a drawing control, such as a GroupBox. Drawing controls always appear
behind other controls whether or not the Bring to Front or Send
to Back items on the pop-up menu are set. However, drawing controls
can be on top of or behind other drawing controls.
