header file is searched which contains delay_cycle

[muahaha]

I used a MPLAB program and C18 compilear but my program does not recognized some commands which delay_cycle.....

I find a header file which must haver delay_cycle...

[Ttelmah]

This is a ccs group, not C18. Delay_cycles is a CCS function. You can write something yourself, a 'cycle' in this context, is just one machine instruction, so a macro, which substitutes a 'nop' for every count in the 'delay_cycle' function, will give the same effect. If you want to find whether C18, has such a function already defined, then ask in a C18 group.

Best Wishes

[Mark]

For C18 look in delays.h file. They have several functions but none work as well as the CCS functions as far as being "user friendly".