Help with ADC &16F628A

[peu]

Im lost in only six lines of code, I type this on microcode/pbp2.46 (yes I set 16F628A in microcode studio)

ADCON0 = 1
lectura var byte
mainloop:
Adcin 0, lectura
Goto mainloop
End

and I get errors during compile.

Its been a while from my last programming, so maybe Im missing something obvious here.

I would appreciate a working example of ADC for this pic or for 18f pics

Thanks in advance