Invalid gadget group handle

I'm not too experienced with BP. I'm not too sure of what a gadget group handle is, but it's saying that I have an invalid one and highlights this line:

CreateLabel("Address:",40,50,50,20,0)

I just put 0 for the gadget group handle cause I don't know what else to put. What should I do?

You should be putting in the windows, or parents handle

Ohhhhh thanks!