wxTextCtrl problem

[austin]

I produced 5 wxTextCtrl.
My program is to let the user enter the serial number.
Each wxTextCtrl has 4 maxlength.
My ideal is
if the user enter 4 digits on first wxTextCtrl, and the program will move
the cursor to the second wxTextCtrl.
I checked the wxTextCtrl::Set InsertingPoint.
But this function is only move on itself.
For exammple,

xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxx

.....
.....

self.tctrl_1 = wxTextCtrl(.... ..)
self.tctrl_2 = wxTextCtrl(.... ..)

self.Bind(EVT_T EXT,self.OnText Processing_1,se lf.tctrl_1)
self.Bind(EVT_T EXT,self.OnText Processing_2,se lf.tctrl_2)

.....
.....

def OnTextProcessin g_1(self,evt):
if len(evt.GetStri ng())==4:
self.tctrl_2.Se tInsertionPoint (0)

xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxxxxxx


The code "self.tctrl_2.S etInsertingPoin t(0)" doesn't work.
But if i change to "self.tctrl_1.. ." works fine.

So what's problem?