subfile question

I currently have a cobol app that uses subfiles.  I have to modify that app
to add a search field for the already loaded subfile. 
  
My subfile, subfile1 has 4 fields, fld1, fld2, fld3, fld4. 
  
When the subfile is initially loaded, it can contain hundreds of records,
which could take hours paging up/down to find the correct one to change or
view.  After the subfile is initially loaded, I want to take my search
string..srchfld and position to that value that will be in fld1.  Then
redisplay my subfile which is now positioned to that record. 
  
I cant find any good examples anywhere, which is why I am asking. 
  
Any good advice? 

Thanks 

George Van Eaton 
Systems Analyst
ArvinMeritor 
george.vaneaton@xxxxxxxxxxxxxxxx 
Phone 615.221.7409 
Fax 615.221.7185