TabAlignment[in] Variable which specifies the type of alignment for a single tab stop. It may be set to one of the constants from the ParagraphTabAlignmentEnum.LeaderType[in] Variable which specifies the type of the tab leaders. It may be set to one of the constants from the TabLeaderTypeEnum.Position[in] Variable which specifies the position of the tab stop, counted from the left border of the paragraph in hundredth parts of point (point is 1/72”).Result[out, retval] A pointer to ITabPosition* pointer variable that receives the interface pointer of the added TabPosition object.