>I'd like to disable all controls in a form if its tag property = 'X'. Is there an easy way to do this? Thank you all!

You can write a method (I've named it RecurseForTagX here) which would take a container object (form, pageframe etc) as a parameter and call it recursively:

lParam toObj
do case
  case pemstatus(toObj,"Tag",5) and toObj.Tag="X"
{do what you need with it}
  case inlist(toObj.Class,"Pageframe","Page","Grid", ;
      "Commandgroup","Optiongroup","Form","Toolbar", "Container")
   for each loObj in toObj.controls
     this.RecurseForTagX(loObj)
   endfor
endcase

If you're using VFP6, then you'd have to have the second case broken down for button groups (which didn't have .controls, but only .buttons back then), pageframes (.pages), grids (.columns), and I think the rest would go as having .controls collection.