QEI for dsPIC33CK256MP506

Hi, I'm new for dspic33ck. Could anyone show me a working QEI main.c code for dsPIC33CK, and the configuration register values for it? Thanks so much!
 
i want to use in QEI mode, index signal resets POSxCNT, and generates interrupt. when the encoder rotates clockwise, POSxCNT increases, otherwise decreases. No HOME or UP/DOWN signals. Thanks.