Find if a file exists?

FileExists('C:\temp\Notes.txt');

FileSearch('Notes.txt', 'c:\temp;c:\Winnt;c:\backup');

function fileExists(fname: String): boolean;                                  
var                                                                           
   f: file of byte;
                                                                   
begin                                                                         
   Assign(f,fname);                                                           
   {$I-}                                                                      
   Reset(f);                                                                  
   {$I+}                                                                      
      if (IOResult = 0) then
      begin
         close(f);
         fileExists:=true;
      end
      else
         fileExists:=false;                                                  
end;