Blog Classes content update

Hello,

I have updated and fixed some classes sample code that are not UNICODE aware that will not compile inside VS2005 (ObjectARX 2007, 2008 and 2009).

Basically, I have changed:

- Add _T() macro to all strings;
- Changed strcpy() to _tcscpy() which is UNICODE aware;
- Changed char* to TCHAR* or to ACHAR* pointers;

Important: ACHAR is a typedef present inside "AdAChar.h" ObjectARX header. If you are trying to compile for non-UNICODE ObjectARX versions replace ACHAR* by TCHAR* (or char*) and you should get out of compilation errors.

Cheers!