Galera ao compilar este exemplo, me gera este erro, alguem sabe como resolver?
Application
===========
Path and name: c:\FWH1306\samples\getcalc.exe (32 bits)
Size: 2,438,656 bytes
Compiler version: xHarbour 1.2.3 Intl. (SimpLex) (Build 20130422)
FiveWin Version: FWHX 13.05
Windows version: 6.1, Build 7601 Service Pack 1
Time from start: 0 hours 0 mins 0 secs
Error occurred at: 05/23/14, 11:26:04
Error description: Error BASE/1004 Class: 'NIL' has no ex