Creating HU

Hi Experts,

I want to create HU and the created HU must be barcoded and must be printed using SMARTFORMS in EWM???

Please help me creating HU  by using class /SCWM/IF_PACK_BAS or /SCWM/CL_WM_PACKING.

Method CREATE_HU or /SCWM/IF_PACK_BAS~CREATE_HU.

Please provide me a complete code since I am new to EWM.

Please, Experts, do reply.....

Thanks.