hello comunity

my program dislay a cursor that give information to insert line on my acounting program.
i need to know how can replace dterminate text on one column field of my cursor and changing to another texte:
for example
cursor name : teste
column field to find portion of text: teste.descricao
text returning by cursor : Reg.de V/Factura nº 127b por letra.
text to replace : por letra
new text : por Chq

i have the following sintax:
select teste
scan for teste.descricao = "%"+'por letra'+"%"
if not eof()
replace teste.descricao with "por chq"
endif
endscan

i pretend returning on my cursor in column teste.descricao : Reg.de V/Factura nº 127b por chq.

Also , i need to refresh this cursor on my screen after running this code.

Many thanks
Luis Santos