diff --git a/todo.md b/todo.md
index 6accdde..7cfbf99 100644
--- a/todo.md
+++ b/todo.md
@@ -3,13 +3,15 @@ so I don't forget:
 - Control.Show()/Control.Hide()
 - Control.SetText()
 
+implementation things:
+- the only thing sysData needs from a window's control is the method to trigger a resize; write that in when I handle resizes
+
 super ultra important things:
 - the windows build appears to be unstable:
 	- 64-bit doesn't work, period: it crashes in malloc in wine with heap corruption warnings aplenty during DLL loading; in windows 7 CreateWindowExW complains about an unregistered window class, yet the RegisterClassW appears to have succeeded and examining the stack in WinDbg indicates the correct class name is being sent (see below)
 	- 32-bit: it works now, but if I save the class name converted to UTF-16 beforehand, wine indicates that the class name is replaced with the window title, so something there is wrong...
 
 important things:
-- maybe make it so I don't need to expose Window.sysData to controls? I need a way to get the window HWND for the Windows one...
 - maybe make it so sysData doesn't need specialized info on every control type?
 - write an implementation documentation.