does't we support mouse x-button click event detect?,i need one

[Iteravse]

does't we support mouse x-button click event detect?,i event hook like that, and we need function parameter detail in document,i just found parameter definition in code like this:

	var (
		// cs   *C.char
		mArr = []string{"mleft", "center", "mright", "wheelDown",
			"wheelUp", "wheelLeft", "wheelRight"}
		mouseBool bool
	)