(Graphical interfaces only)
Indicates whether the rectangle appears with rounded corners.
Data type: LOGICAL
Access: Readable/Writable
Applies to: RECTANGLE widget
When TRUE, the rectangle appears with rounded corners (whether the display is set to the Windows XP Theme or the Windows Classic Theme). When FALSE, the rectangle appears with square corners.
If you set this attribute after the widget is realized, its affect is immediate (if the widget is visible).