2 questions about VNC viewer

I am using VNC Viewer 4.0 in my windows enviornment. The questions are:

  1. how do you switch the applications in VNC enviornment?
    ALT-tab doesn't work since it just switchs among VNC viewer itself and other windows applications.

  2. how to copy/paste the texts from VNC enviornemnt to windows enviornemnt? Vice versa.

Thanks in advance!

The answer to the first problem is ALT +1, ALT+2...nd so on..