>I have a form namely Search .Scx, In that i have placed one text box namely txtseach and one grid control. Further i have a table namely phone.dbf . The record source of the grid is Phone.dbf.
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>I want the list of records in the grid to be filtered based on what I have typed in txtsearch box.
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>How to do this?

if the grid is table bound, "set filter" to the alias.
If you are using cursors via cursoradapter, adapt whereclause to include a filterexpression and requery. No grid unbinding in this case, IMO best technique.
If you are using safe select technique for grids, fill your gridcursor again based on new filter.