you can try the mplab a/d test program for 18f452 its simple and if you are ok with c it will be better you need 1 c18 2mplab with documents once u got the c18 inside mplab by checking the right box while installing c18(after mplab)you can use the example in mpalb manual takecare abby -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist