Causes the cells of the range to be spoken in row order or column order.
The following arguments are optional
SpeakDirection - The speak direction, by rows or columns
SpeakFormulas - True will cause formulas to be sent to the Text-To-Speech (TTS) engine for cells that have formulas. The value is sent if the cells do not have formulas. False (default) will cause values to always be sent to the TTS engine