Need help with the Online Trend Control

Hi,

I am trying to place one graphic in a PDL inside a picture window, and my goal is that clicking on buttons placed on various places of a WinCC picture (with the graphic picture window visible) I can change the Property “TagName” (that is available in Control Properties) that I associate to the tag logging archives. My objective is to display different graphics in one “WinCC online trend control” associated to the button that I clicked (selecting the info of the tag logging that I pretend to display). I’m trying to do this using a C-action. Could anyone give me a tip how to do it.

Thank You.