Hello Marry,
HCM P&F has at present 2 flavours one supporting Abobe based froms (SAP courser HR280) and the other FPM forms.
You will find several blogs by in SCN ( the ones by Christopher Solomon , Ian Stubbings , Raja Sekhar Kuncham , Philip Johnston to list a few)
You could also refer to HCM Processes and Forms: HCM Processes and Forms
Hope this helps.
Regards,
Sahir.