VtSetValues widgetName [options]
Used to set the value of a widget option. The option name used is the same option used in widget creation. Only options which have an S next to the option name in the command reference can be set with VtSetValues.
(Valid options for the particular widget. -xmArgs to pass X resources to the server.)
VtSetValues $myLabel -label foo
Sets the label string of $myLabel
to foo.