This method exists for backward compatibility. You are advised to use the WorkArea option of the Alignment layout property.
Set-workarea() can be called (e.g. from the Post-open property of Info Box objects) to specify that the window or dialog involved must resize itself when the end user drags the embedded Tree View or List View to a bigger/smaller size. To make this possible the Resize Child property must be set to Yes as well.
Name of the Tree View, or List View control involved.
Table (Info Box)