BCB XE7安卓開發怎麼把String給wchar_t？

void __fastcall TForm1::Button1Click(TObject *Sender)
{
String T_LTJH=L"你好！";
unsigned long Len=T_LTJH.Length();
wchar_t *x = new wchar_t[Len 1];
wmemset(x,'\0',Len 1);
wcscpy(x,(WideString(T_LTJH)).c_bstr());
//strcpy_s(x, Len, WideString(T_LTJH).c_bstr());
delete[] x;
x=NULL;
}
這個代碼，提示：
no matching conversion for functional-style cast from 'String' (aka 'System::UnicodeString') to 'System::WideString'
是在wcscpy(x,(WideString(T_LTJH)).c_bstr());出的提示，找不到原因啊
在桌面版開發正常，安卓不行