diff -ur v6/wx_ut.py v7/wx_ut.py
--- v6/wx_ut.py	2020-07-18 23:26:30.000000000 +0900
+++ v7/wx_ut.py	2020-10-01 20:03:50.000000000 +0900
@@ -104,8 +104,8 @@
 	wx.PostEvent( obj, ev )
 
 
-def new(title, init, fini=None, args=None):
-	e = empty.new( app=None, frame=None, args=args )
+def new(title, init, fini=None, args=None, on_init=None):
+	e = empty.new( app=None, frame=None, args=args, on_init=on_init )
 
 	newed_objs = {}
 
@@ -339,7 +339,11 @@
 			e.frame.Layout()
 			e.frame.Fit()
 			e.app.SetTopWindow( e.frame )
-			e.frame.Show()
+
+			if e.on_init:
+				e.on_init( e )
+			else:
+				e.frame.Show()
 			return 1
 
 	def poll_start(poll_func, sec, hz, gc):