Controls which cells in an array should be treated as missing.
This property controls which cells in an array are treated as missing.
      If the FillArray property is set
      to a value other than None, then these cells will be filled
      with a default value.
    
CellUseDefault may include any, all or none of the following flags:
| Flag | Description | 
|---|---|
| MissingOrEmpty | Cells that are empty are considered to be missing. | 
| Blank | 
            Blank cells are considered to be missing. This 
            would include a cell containing ="".
           | 
            
| Zero | Numeric cells with zero values are considered to be empty. | 
| Nonnumeric | Non-numeric cells are considered to be empty. |