BCB：AnsiString BSTR WideString

WideString wstr;
AnsiString astr;
wchar_t *wp;//或者 BSTR wp;

wp=wstr.c_bstr(); //WideString转化为BSTR
wstr=astr;//AnsiString转化为WideString
astr=wstr;//WideString转化为AnsiString
wstr=wp;
astr=wp;