如何将字符串转换为BYTE

[wxdcxp]

例如
BYTE Buff;
AnsiString s = "FF";
转换后
Buff = 0xFF;

[xjq2003]

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  BYTE Buff;
  AnsiString s = "FF";
  AnsiString temp="0x";
  temp+=s;
  int hex=StrToInt(temp);
  Buff=hex;
}