diff -ur v7/wx_ut.py v8/wx_ut.py
--- v7/wx_ut.py	Thu Oct  1 20:03:50 2020
+++ v8/wx_ut.py	Mon May  2 19:11:52 2022
@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 
+import os
 import wx
 
 import empty
@@ -333,18 +334,35 @@
 			e.app = self
 			e.frame = wx_new( wx.Frame, title, parent=None )
 			bind( e.frame, quit_hdl, wx.EVT_CLOSE )
+			set_icon()
 
 			init( e )
 
 			e.frame.Layout()
 			e.frame.Fit()
+			e.frame.FitInside()
 			e.app.SetTopWindow( e.frame )
 
+			( w, h ) = e.frame.GetSize()
+			e.frame.SetMinSize( ( w, h + 10 ) )  # title bar height ?
+
 			if e.on_init:
 				e.on_init( e )
 			else:
 				e.frame.Show()
 			return 1
+
+	def set_icon( path='hoge.png' ):
+		if not e.frame:
+			return
+
+		if not os.path.exists( path ):
+			return
+
+		bm = wx.Bitmap( path )
+		icon = wx.EmptyIcon()
+		icon.CopyFromBitmap( bm )
+		e.frame.SetIcon( icon )
 
 	def poll_start(poll_func, sec, hz, gc):
 		th = None