Typically for supported Grids in QA Wizard Pro you can get the property that has this value in.
Here is an example of a .NET Grid and the ability to get the number of rows:
'Get the count of the number of rows that are in the grid
numRows = Window("WysiCorp CRM").Grid("accountsDataGridView").Property("Number of Rows")
Now your Grid sounds like a CompononetOne Grid so you first have to verify if you can access each cell and if you can access any properties on the Grid.
You can also get a list of properties if you are unsure of what the property is with the row count.
Here is an example to get properties:
strProperties = Window("WysiCorp CRMContact").ListView("listViewHistory").GetPropertyMap()