求教大侠一个关于 regexp 正则表达式的问题

[xiangzhong]

为什么我的返回的总是空字符串啊?

IRegExp* re=new IRegExp; //初始化一个 字符串 正则表达式

re->SetIgnoreCase(true); //忽略大小写
re->SetGlobal(true); //搜索整个字符串

LPCTSTR str1="I am a writer and he is a worker.";
re->SetPattern("am|is");
str1=re->Replace(str1,"are");

为什么替换后str1变成空字符串""了呢?

哪里错了,请指教?

[lion_wing]

什么编程环境？没见过

[sunmz_wjxy]

CComPtr<IRegExp> ptrRegExp;
CoCreateInstance(__uuidof(RegExp), NULL, CLSCTX_INPROC_SERVER, __uuidof(IRegExp), (void**)&ptrRegExp);
ptrRegExp->put_Global(VARIANT_TRUE);
ptrRegExp->put_IgnoreCase(VARIANT_TRUE);
CString csPattern4PTR = _T("^[1-9](?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)[0-9]{2}$");
ptrRegExp->put_Pattern(_bstr_t(csPattern4PTR));

memset(value, '\0',1024);
GetDlgItemText(dlgItem, value, 1024);

VARIANT_BOOL vbMatch;
ptrRegExp->Test(_bstr_t(value),&vbMatch);

if (!(kvValid.IsDateDDMMMYY(value) || kvValid.IsDateDDMMMYYYY(value) || vbMatch == -1))
{
TCHAR promptMsg[1024];
//LoadString(m_hInstResource, ResourceID, promptMsg,1024);
LOAD_STR(ResourceID, promptMsg,1024);
MessageBox(promptMsg ,promptTitle ,MB_OK|MB_ICONSTOP);
::SetFocus(GetDlgItem(dlgItem));
return(false);
}