Depends if it is Unicode or not it appears. LPTSTR is char* if not Unicode, or w_char* if so.
Discussed better here (accepted answer worth reading)
Here are a lot of ways to do this. MFC or ATL's CString, ATL macros, or Win32 API.
LPTSTR szString = _T("Testing");
char* pBuffer;
You can use ATL macros to convert:
USES_CONVERSION;
pBuffer = T2A(szString);
CString:
CStringA cstrText(szString);
or the Win32 API WideCharToMultiByte if UNICODE is defined.