I am trying to disable a grid from having items edited if an invoice is finished. The code I am trying is as follows:

IF invoice.status = "FINI"
	thisform.pageframe1.page1.basecont1.grdbase1.Columns.setall("enabled",.f.)
ELSE
	thisform.pageframe1.page1.basecont1.grdbase1.Columns.setall("enabled",.t.)
ENDIF 

I am getting an error that columns is an unknown member, although intellisense is offering it to me when I am doing the coding. What is the correct method to do what I am trying to do?

Thanks in advance.