As I'm diversifying my knowledge in coding/scripting/markup languages, I want to diversify even more! Next step I want to learn is either C/C++. Here is what I know so far:

PHP
MySQL
HTML
CSS
JScript
Java
Visual Basic .NET
ASP
ASP .NET

I should rephrase this, I want to get more into GUI programming/Server client programming in C/C++. Can someone show me the best way to learn this stuff?

I have found that if you know that much languages, you don't have to learn a new language, you just simply start coding in it. And if you don't know something you Google it.

The C/C++ syntax is not far from Java and PHP, so it should not be that difficult.

Another thing: Don't just diversify for the fun of it. Certain languages are better than others for specific tasks. If you learn stuff you won't use its a waste of energy (not that I think C++ is bad or anything). Therefore if you you need to code something that would be best in C/C++, then learn it - else don't. If you don't know the pros and cons about languages, Google will have plenty to say.