>>>Yes, 'in run-time' means in code.
>>>Thisform.Grid.RecordSource=newalias && I assume you use RecordSourceType=1
>>>Thisform.Grid.Refresh
>>
>>Still not happening for some reason, the orig dbf is still showing up.
>>Does the code get put in the activate cell area?
>
>Put this code into some button click event and test it from there.

One thing that seems to give the grid the appropriate "push" is to reset the columns - like this:

WITH Thisform.grdMyGrid
.ColumnCount = 0 && destroy all old columns
.ColumnCount = -1 && grid automatically allocates columns
.RecordSource = "MyNewAlias" && assign new alias
.Refresh() && redraw grid
ENDWITH

If the grid has a lot of columns, you might want to wrap this in a .LockScreen, but it's not usually necessary.