Sergey,
Thanks now I am almost there,
I thought

NODEFAULT 
RETURN .f. 

in the beforenavigate2 method
will prevent the navigation to occur so it does not get the [The page cannot be displayed] error page

Peter


>Try

TEXT TO lcStrEn NOSHOW TEXTMERGE
>MyField%3DAAAAAAAAAA%26S1%3DBBBBBBBBBB%250D%250ABBBBBBBBBB%250D%250ABBBBBBBBBB%26D1%3DCCCCCCCC%26B1%3DSubmit%00
>ENDTEXT
>

Peter Cortiel