I use one or more "parameterx" objects to store variables. The object checks if a property exists, and if not, it creates it.

If Vartype(ofakt)#'O'
  oMemo=CreateObject('parameterX')
EndIf 
oMemo.nInvoice=lnInvoice
oMemo.lShowprice=llShowprice
oMemo.lLogo=.T.
oMemo.cJob=''
....

define class ParameterX as custom
  function This_Access(tcMember)
    if type('This.' + tcMember) = 'U'
      This.AddProperty(tcMember)
    endif
    return This
  EndFunc 
  function AddVar(tcMember,tcData)
      AddProperty(this,tcMember,tcData)
    return This
  endfunc
EndDefine

>Not sure if I'm putting this correctly, but I found myself putting a number of properties on a form that contained patient demographic data that was passed into the form. Would it be better to create a form array (object, collection?) that contained all the different properties for the patient? How would I do that? I know how to creat a form array, but is there a different/better way to have a collection of items that will need to be in scope for the entire form?