Row.HeightRule (Word)

Returns or sets the rule for determining the height of the specified cells or rows. Possible return values are wdRowHeightAtLeast - The row height is at least a minimum specified value, wdRowHeightAuto - The row height is adjusted to accommodate the tallest value in the row, wdRowHeightExactly - The row height is an exact value.

Set newDoc = Documents.Add 
Set myTable = newDoc.Tables.Add(Range:=Selection.Range, _ 
 NumRows:=3, NumColumns:=3) 
With myTable.Rows(2) 
 .Height = 24 
 .HeightRule = wdRowHeightAtLeast 
End With