Hello,

The pipbvb.chm help file is really good once you are familiar with the objects and symbols within ProcessBook - it will become clearer for you the more you use it.
Of course there is a ProcessBook section on our forum for ProcessBook specific code examples: http://www.rjksolutionsltd.co.uk/forum/yaf_topics9_PI-Tips-and-Tricks-PIProcessBook.aspx

For you particular scenario you need to work with the "Trend" object (see "Trend Class" in pipbvb.chm), in particular the Trend Methods "AddTrace, RemoveTrace and SetTagName" methods.

For example, if you have a Trend on your display called "Trend1" and a Combobox called "cb1" then you could have the code to change the trace shown:



Alternatively, you could do something like the following:

Hello,

Nope you don't need to make a connection to the server, ProcessBook already handles the connections.
If your combobox you need the full path to the tag you want, which includes the servername. For example, "\\server1\sinusoid" or for another server "\\server2\sinusoid".