ListLevel.Alignment procedure builder

ListLevel.Alignment (Word)

Returns or sets a WdListLevelAlignment constant that represents the alignment for the list level of the list template.

wdListLevelAlignCenter - Center-aligned, wdListLevelAlignLeft - Left-aligned, wdListLevelAlignRight - Right-aligned.
ActiveDocument.ListTemplates(1).ListLevels(1).Alignment = wdListLevelAlignCenter