UNICODE 转换

function WideCharToChnByte(ws:pbyte; var s:String):Integer;
var
  l : integer;
begin
  l := WideCharToMultiByte(936,0,PWideChar(ws),-1,nil,0,nil,0)-1;
  setlength(s,l);
  WideCharToMultiByte(936,0,PWideChar(ws),-1,@s[1],l,nil,0);
  result := l;
end;

function chnByteToWideChar(s:pbyte; var ws:WideString):Integer;
var
  l : integer;
begin
  l := MultiByteToWideChar(936,0,PChar(s),-1,nil,0)-1;
  setlength(ws,l);
  MultiByteToWideChar(936,0,pchar(s),-1,@ws[1],l);
  result := l;
end;

function toUNICODE(s:string):WideString;
begin
  chnByteToWideChar(@s[1],result);
end;

function toCHINESE(ws:WideString):string;
begin
  WideCharToChnByte(@ws[1], Result);
end;