Thank you Bruce. I have figured it all out now, I think. Wont have time to test it for a day or two. I have:

define OSC 20
define adc_bits 10
define adc_sampleus 50
CMCON = 7 'turns off comparators
ANSEL = 1 'channel 0 analog all others digital
ADCON0 = 129 'right justified, vref = vdd, chan 0 active, A/D converter on
ADCON1 = 96 'fosc/64 (20MHz osc)

Once again thanks for your help.

Regards
Bob...