Menu:  Edit Worksheet

This procedure provides an alternative method for editing input values.

All input values for the current case are transferred to an Excel worksheet, which the user can edit from within the Excel window. 

When editing is complete, the user minimizes the Excel window & clicks  'Yes' on the dialog box to accept changes or 'No' to ignore them.

The user should not close the Excel window, but minimize it (click '-' not 'x') in upper right corner.

Data for tributaries and segments must be entered in contiguous columns in increasing order.  Worksheet columns or rows should not be deleted, but data values can be cleared by selecting cells and pressing the 'Del' key. 

As compared with the individual edit screens, it is easier to enter an invalid case with this procedure because there is less error checking.  So, the program is more likely to crash.