In Assition to Jos's reply, you can also do this:

zap in crsrgrid
set safety on
select * from melamdim into cursor tmp NOFILTER 
SELECT crsrgrid
APPEND FROM DBF( 'tmp' )
GO TOP IN crsrgrid
ThisForm.grdmelamd.refresh()

Of course, for this to work, you will have to create crsrGrid in the form's LOAD() method either using the CREATE CUROR command or using the SELECT INTO CURSOR READWRITE syntax.