function TForm1.strtohex(str:string):string; var i:integer; begin for i:=1 to length(str) do begin result:=result+inttohex(ord(str[i]),2); end; end;function Tform1.hextostr(hex:string):string; var i,j,k:integer; begin k:=length(hex) div 2; for i:=1 to k do begin case hex[2*i-1] of '0'..'9':j:=strtoint(hex[2*i-1]); 'a'..'f':j:=ord(hex[2*i-1])-87; 'A'..'F':j:=ord(hex[2*i-1])-55; end; case hex[2*i] of '0'..'9':j:=j*16+strtoint(hex[2*i]); 'a'..'f':j:=j*16+ord(hex[2*i])-87; 'A'..'F':j:=j*16+ord(hex[2*i])-55; end; result:=result+chr(j); end;end;
var i:integer;
begin
for i:=1 to length(str) do
begin
result:=result+inttohex(ord(str[i]),2);
end;
end;function Tform1.hextostr(hex:string):string;
var i,j,k:integer;
begin
k:=length(hex) div 2;
for i:=1 to k do
begin
case hex[2*i-1] of
'0'..'9':j:=strtoint(hex[2*i-1]);
'a'..'f':j:=ord(hex[2*i-1])-87;
'A'..'F':j:=ord(hex[2*i-1])-55;
end; case hex[2*i] of
'0'..'9':j:=j*16+strtoint(hex[2*i]);
'a'..'f':j:=j*16+ord(hex[2*i])-87;
'A'..'F':j:=j*16+ord(hex[2*i])-55;
end;
result:=result+chr(j);
end;end;