Problem with filter

[Silvio.Falconi]

How create a filter with many option ?
I have two filter but I set it on different function
I can set before
1. for Mounth sample month(MV->data) == i
and then

2. for category sample RTrim( MV->Cat)== RTrim(aCat[i])


I wish insert all into a CFilter string and use it with MV->(DbSetFilter(cFilter ))