add hook example to robotgo examples

examples/hook/main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+
+	hook "github.com/robotn/gohook"
+)
+
+// hook listen and return values using detailed examples
+func add() {
+	s := hook.Start()
+	defer hook.End()
+
+	ct := false
+	for {
+		i := <-s
+
+		if i.Kind == hook.KeyHold && i.Rawcode == 59 {
+			ct = true
+		}
+
+		if ct && i.Rawcode == 12 {
+			break
+		}
+	}
+}
+
+// base hook example
+func base() {
+	evChan := hook.Start()
+	defer hook.End()
+
+	for ev := range evChan {
+		fmt.Println("hook: ", ev)
+	}
+}
+
+func main() {
+	base()
+
+	add()
+}