How to convert Bstr to LPCSTR/LPSTR

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I have COM Server(ATL) where i have few interfaces.I have a interface in which a parameter is BSTR .I need to convert this parameter(bSTR) to LPSTR/LPCSTR to use inside the interface for calling Win32 API's.

<b>Ex:CreateProcess</b>

Posted 23-Aug-11 2:33am

explorerC

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Sergey Chepurin 23-Aug-11 8:57am

Using _bstr_t don't forget to add:

#include "comutil.h"
#pragma comment( lib, "comsuppwd.lib")

or compile with: /link comsuppw.lib

2 solutions

Solution 2

You may use the _bstr_t class, see The Complete Guide to C++ Strings, Part II - String Wrapper Classes[^].

Posted 23-Aug-11 2:40am

CPallini

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Jose David Pujo · Accepted Answer · 2011-08-23T02:40:00

Solution 1

Take a look at the helper class _bstr_t
http://msdn.microsoft.com/es-es/library/zthfhkd6.aspx[^]

Sample:

_bstr_t bb(BSTR_var);  // Helper class
char *s= bb;       // Convert to LSTR