What is that tpKanaltypes all about?

Hi,
where can I find information about 'tpKanaltypes' from CreateVar function?
i.e.
myVariables.CreateVar(VarName, zDriver, zenOn.tpKanaltypes.tpSystemVariable, zVarType);
Thanks in advance!

You can find this information in the driver documentation under driverobjects. There you will find a number for each driverobject the driver supports.
If you want to use the constant tpKanaltypes then you must look in the help under programming interface-Constants-tpKanaltypes.