Hello comunity

i have the following script on my client/server application :
for ex.

Local msel as string
text to msel textmerge noshow
select ref from st (nolock) where ref like '1%'
endtext


if u_sqlexec(msel,[Curs1]) then
select Curs1
if not eof() then
replace st.fieldA with Curs1.ref
endif
endif

I need a command to close Cursor Curs1 after commit transaction, what command i do use :
CLOSE ALL, CLEAR.......??

Many thanks
Luis Santos