TableOfContents.TabLeader (Word)

Returns or sets the character between entries and their page numbers in an index, table of authorities, table of contents, or table of figures. Possible return values are wdTabLeaderDashes - Dashes, wdTabLeaderDots - Dots, wdTabLeaderHeavy - A heavy line, wdTabLeaderLines - Double lines, wdTabLeaderMiddleDot - A middle dot, wdTabLeaderSpaces - Spaces. Default.

For Each aTOC In Documents("Sales.doc").TablesOfContents 
 aTOC.TabLeader = wdTabLeaderDots 
Next aTOC