Bound DBGrid control and bookmarks

I am trying to reposition a bound DB grid to show a specific record based on the value contained in a textbox.
The firstrow method requires the assignment of a bookmark, and I can't seem to find a clear definition of a bookmark.  Is it defined by the system, or the program?  Is it a string field, a variant field or a number?  Can someone give me a good explanation of how to use bookmarks in a bound DB grid program?  Thanks in advance, Jim.
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dhwanilshahConnect With a Mentor Commented:
Just use the find/move methods of the recordset to which the dbgrid is bound to. DBGrid will change its position accordingly.

for eg. :

'if DBGrid is bound to a data control then :

data1.recordset.findfirst "fld1=criteria"

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