MyForm.refresh contains the code...
DODEFAULT() && calls baseclassform.refresh
other form-specific code

BaseClassForm.refresh contains the code...
DODEFAULT()
other generic form refresh code

MyForm.combo.refresh contains the code
DODEFAULT() && calls generic combo refresh code
other instance-specific refresh code


If you don't put NODEFAULT clause,
then VFP call BaseClass::Refresh automatically,
after that your Refresh code is executed.

Then, remove DODEFAULT()

MyForm.refresh contains the code...
DODEFAULT() && calls baseclassform.refresh
other form-specific code
* Next line cut VFP internal flush, and Form::Refresh is not done
* But by Design ( a bad design ), after the Init() event, 
* VFP call Refresh like a event, and on this case it 
* ignore NODEFAULT and then you have two Refresh cycles.
* In order to remove this inefficient behavior 
* you must write a code that recognizes the first Refresh call, and on baseclass execute a NODEFAULT
NODEFAULT
* Now, only for the First call VFP call a Form::Refresh

BaseClassForm.refresh contains the code...
other generic form refresh code
* Now VFP call a Form::Refresh

MyForm.combo.refresh contains the code
other instance-specific refresh code
* Now VFP call a Combobox::Refresh

Another solution is to put NODEFAULT on BaseClassForm, and call Form::Refresh explicitly.

Fabio