var myfilestream:tfilestream;
myblob:tblobfield;
begin
adoquery1.edit;
myfilestream:=tfilestream.Create('c:/aa.bmp',fmopenread);
myblob:=tblobfield(adoquery1.FieldByName('Photo'));
myblob.LoadFromStream(myfilestream);
myfilestream.Free;
adoquery1.Post;
end;