TextFrame.ColumnSpacing Property (Publisher)
Office 2013
Returns or sets a Variant that represents the amount of space between text columns. Read/write.
Spacing measures from the end of the text to the end of the column and again from the beginning of the column to the beginning of the text. Thus, if you enter a ColumnSpacing amount of 0.5 inch, the total spacing between columns is one inch: 0.5 inch measuring from the end of the text to the end of the column in one column, plus 0.5 inch measuring from the beginning of the column to the beginning of the text in a neighboring column.