You question says how to convert to char *, but the error is the conversion to wchar_t *. They are quite different.

A PString is always UTF-8 (8 bits per character) and wchar_t is 16 bits (possibly more) per character. A CString in MFC is sometimes 8 bit sometimes 16 bit (UNICODE) depending on compiler options. Which makes coding tricky.

So, if your code is guaranteed to always be using UNICODE CString just go other.AsUCS2() in your == operator. You can also look at the class PWideString for more.

Robert Jongbloed

OPAL/OpenH323/PTLib Architect and Co-founder.

From: h323plus-bounces@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of ZAHRA dehghanianfard
Sent: Thursday, 29 October 2009 9:00 PM
To: h323plus
Subject: [h323plus] please help us to convert PString object content to char * in VC++.

hi sir/modem
Many thanks for your last regards, I have a problem about data conversion.
i need to convert PString (a class exist in pstring.h inside ptlib package) object content to char *  but How can i do this ? for more clearance i write the real code below:

inline bool operator==(const PString & other)         const { return CString::Compare(other); }
i need to convert other object content to wchar_t * but when run this code it have below error in VC++ 2005 .

error C2664: 'ATL::CStringT<BaseType,StringTraits>::Compare' : cannot convert parameter 1 from 'const PString' to 'const wchar_t *'

Please help me to solve this problem.
I am in wait for your response.
Best regards.
Zahra.

---

New Email addresses available on Yahoo!
Get the Email name you've always wanted on the new @ymail and @rocketmail.
Hurry before someone else does!