本文整理自网络，侵删。
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Edit1: TEdit;
Edit2: TEdit;
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
function StrtoUnicode(Str:string):string;
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
function TForm1.StrtoUnicode(Str:string):string;
var
s:string;
i,j,k:Integer;
a:array [1..1000] of Char;
begin
s:='';
StringToWideChar(Str,@(a[1]),500);
i:=1;
while ((a[i]<>#0) or (a[i+1]<>#0)) do
begin
j:=Integer(a[i]);
k:=Integer(a[i+1]);
s:=s+copy(Format('%X',[k*$100+j+$10000]),2,4);
i:=i+2;
end;
Result:=s;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
Edit2.Text:=StrtoUnicode(Edit1.Text);
end;
end.
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