XmTextSetTopCharacter — A Text function that sets the position of the first character displayed

XmTextSetTopCharacter sets the position of the text at the top of the Text widget.  If the XmNeditMode is
       XmMULTI_LINE_EDIT, the line of text that contains top_character is displayed at the  top  of  the  widget
       without  the  text  shifting  left  or  right.   If  the  edit mode is XmSINGLE_LINE_EDIT, the text moves
       horizontally so that top_character is the first character displayed.

       widget    Specifies the Text widget ID

       top_character
                 Specifies the position in the text to display at the top of the widget.   This  is  an  integer
                 number  of  characters from the beginning of the text buffer. The first character position is 0
                 (zero).

       For a complete definition of Text and its associated resources, see XmText(3).

XmTextSetTopCharacter  —  A  Text  function  that  sets  the  position  of  the first character displayed
       "XmTextSetTopCharacter" "Text functions" "XmTextSetTopCharacter"

XmText(3).

                                                                                        XmTextSetTopCharacter(3)

       #include <Xm/Text.h>
       voidXmTextSetTopCharacter(
       Widgetwidget,
       XmTextPositiontop_character);