XmTextSetMaxLength sets the value of the current maximum allowable length of the text string in the Text
widget. The maximum allowable length prevents the user from entering a text string from the keyboard that
is larger than this limit. Strings that are entered using the XmNvalue (or XmNvalueWcs) resource, or the
XmTextSetString (or XmTextSetStringWcs) function ignore this resource.
widget Specifies the Text widget ID
max_length
Specifies the maximum allowable length of the text string
For a complete definition of Text and its associated resources, see XmText(3).