If you do not want the value to be displayed and then use the "Tag" property to hold the value temperavorily
Assign the value as follows
txtFind.Tag = "1233";
If you want to show the value
txtFind.Text = txtFind.Tag.ToString() ;
if you want to hide
txtFind.Text = "" ;
Not sure, the length of the data the "Tag" property can hold.....just do a google on this for the safe side or some one comment on this