copying.txt

a file about net phone based on IP,write by VC++.

                  b) Accompany it with a written offer, valid for at least three years, to give any third party,
                  for a charge no more than your cost of physically performing source distribution, a
                  complete machine-readable copy of the corresponding source code, to be distributed
                  under the terms of Sections 1 and 2 above on a medium customarily used for software
                  interchange; or, 

                  c) Accompany it with the information you received as to the offer to distribute
                  corresponding source code. (This alternative is allowed only for noncommercial
                  distribution and only if you received the program in object code or executable form with
                  such an offer, in accord with Subsection b above.) 

              The source code for a work means the preferred form of the work for making modifications to it. For an
              executable work, complete source code means all the source code for all modules it contains, plus any
              associated interface definition files, plus the scripts used to control compilation and installation of the
              executable. However, as a special exception, the source code distributed need not include anything that
              is normally distributed (in either source or binary form) with the major components (compiler, kernel,
              and so on) of the operating system on which the executable runs, unless that component itself
              accompanies the executable. 

              If distribution of executable or object code is made by offering access to copy from a designated place,
              then offering equivalent access to copy the source code from the same place counts as distribution of the
              source code, even though third parties are not compelled to copy the source along with the object code.

              4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under
              this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and
              will automatically terminate your rights under this License. However, parties who have received copies,
              or rights, from you under this License will not have their licenses terminated so long as such parties
              remain in full compliance. 

              5. You are not required to accept this License, since you have not signed it. However, nothing else
              grants you permission to modify or distribute the Program or its derivative works. These actions are
              prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program
              (or any work based on the Program), you indicate your acceptance of this License to do so, and all its
              terms and conditions for copying, distributing or modifying the Program or works based on it. 

              6. Each time you redistribute the Program (or any work based on the Program), the recipient
              automatically receives a license from the original licensor to copy, distribute or modify the Program
              subject to these terms and conditions. You may not impose any further restrictions on the recipients'
              exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties
              to this License. 

              7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason
              (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or
              otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of
              this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License
              and any other pertinent obligations, then as a consequence you may not distribute the Program at all.
              For example, if a patent license would not permit royalty-free redistribution of the Program by all those
              who receive copies directly or indirectly through you, then the only way you could satisfy both it and this
              License would be to refrain entirely from distribution of the Program. 

              If any portion of this section is held invalid or unenforceable under any particular circumstance, the
              balance of the section is intended to apply and the section as a whole is intended to apply in other
              circumstances. 

              It is not the purpose of this section to induce you to infringe any patents or other property right claims or
              to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the
              free software distribution system, which is implemented by public license practices. Many people have
              made generous contributions to the wide range of software distributed through that system in reliance on
              consistent application of that system; it is up to the author/donor to decide if he or she is willing to
              distribute software through any other system and a licensee cannot impose that choice. 

              This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this
              License. 

              8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by
              copyrighted interfaces, the original copyright holder who places the Program under this License may add
              an explicit geographical distribution limitation excluding those countries, so that distribution is permitted
              only in or among countries not thus excluded. In such case, this License incorporates the limitation as if
              written in the body of this License. 

              9. The Free Software Foundation may publish revised and/or new versions of the General Public
              License from time to time. Such new versions will be similar in spirit to the present version, but may
              differ in detail to address new problems or concerns. 

              Each version is given a distinguishing version number. If the Program specifies a version number of this
              License which applies to it and "any later version", you have the option of following the terms and
              conditions either of that version or of any later version published by the Free Software Foundation. If
              the Program does not specify a version number of this License, you may choose any version ever
              published by the Free Software Foundation. 

              10. If you wish to incorporate parts of the Program into other free programs whose distribution
              conditions are different, write to the author to ask for permission. For software which is copyrighted by
              the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions
              for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of
              our free software and of promoting the sharing and reuse of software generally. 
                                       NO WARRANTY 

              11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
              WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
              EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
              OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY
              KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
              IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
              PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
              PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
              THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 

              12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
              WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY
              MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE
              TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
              CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
              PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
              RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
              FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
              SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
              DAMAGES. 
                                END OF TERMS AND CONDITIONS