Sets or returns an int that represents the gutter width for this section. The gutter adds space to the margin. Gutters are used when a document needs additional space to allow for binding. One twip = (1/20 pt) or (1/1440 in)

public int GutterWidth{ get; set; }
<p>Public Property GutterWidth() As Integer</p>

Gutter width may not be smaller than 0" (0 twips) or larger than 22" (31680 twips). Values beyond these will be automatically adjusted.

MS Word equivalent: File menu > Page Setup... > Margins tab > Gutter: -- (Make sure Apply to: This section is selected)

          //--- Return GutterWidth
          int gutterWidth = oSection.GutterWidth;

          //--- Set GutterWidth to 1/2 inch
          oSection.GutterWidth = 720;
        
          '--- Return GutterWidth
          Dim gutterWidth As Integer = oSection.GutterWidth

          '--- Set GutterWidth to 1/2 inch
          oSection.GutterWidth = 720