How I research my plug in Id?
What exactly you mean by "research"? Did you mean "reach" or "search"? If you want to find more info about your plugin either you can query database (table Plugin or something, don't have a SQL Management Studio at hand) or you can use PlugInLocator class to find your plugin.
Thank you Valdis,
I would like search my plug in id. Just this.
You can get plugin ID from the plugins type like this:
var plugin = PlugInDescriptor.LoadAll().FirstOrDefault(p => p.PlugInType == typeof (your_plugin_type));
var pluginId = plugin.ID;