Uso de collection y comparacion de cadenas

Principal uso de collection
http://vbadud.blogspot.com/2008/11/how-to-use-collections-in-excel-vba.html

http://www.lawebdelprogramador.com/foros/Visual_Basic_para_Aplicaciones/973620-Comparacion_de_dos_cadenas.

http://www.mrexcel.com/forum/excel-questions/485383-define-list-values-within-visual-basic-applications-code.html

http://stackoverflow.com/questions/5702362/vba-collection-list-of-keys

http://www.wiseowl.co.uk/blog/s239/collections.htm

http://www.codeproject.com/Tips/697011/A-simple-List-class-for-VBA-projects

http://blogs.itpro.es/exceleinfo/2011/06/06/uso-de-for-each-next-en-vba-excel/

http://www.mundoprogramacion.com/vb/vb_novatos.htm#novato03

http://www.slideshare.net/LATOCHI/programacin-con-visual-basic-para-aplicaciones-en-excel-programacin-puraconexcel