Help with using Text and Blob types

[Danny Willis]

I have a site with a form that takes in a message.  At the moment I have it
set as a VARCHAR but it isn't large enough.  What's the trick to changing
the type to a Text Type of Blob type and working with it?  I've read the
documentation but I still really don't understand what I need to change in
my queries to work with these types.

This is a priority so any help is greatly appreciated.

Thanks.