Copies of each example file are placed in the working directory
and opened. If files with the same name already exist, the user
is prompted with a choice to overwrite.
To use this function in a window description file, the
package, prefix and suffix arguments must
be specified as the action of the widget that calls
openExamples. Furthermore, package, prefix,
and each suffix must be separated by commas. For example,
action=myPackage,example1,.r,.c will copy example1.r
and example2.c from the examples directory of the
package myPackage to the working directory and open these
files. If the function was called by a widget, a widget named
prefix will be set to the specified prefix.