Forms customization- About Custom.pll

One can find good info from below links..

http://oracle.anilpassi.com/custom.pll-2.html
http://oracle.anilpassi.com/custom.pll-best-practice.html

Some commands for CUSTOM.pll

For 11i,

To convert from CUSTOM.pll to CUSTOM.pld
f60gen module_type=LIBRARY module=CUSTOM script=YES userid=apps/apps

To convert back from CUSTOM.pld to CUSTOM.pll ( after having edited the text pld file )
f60gen module_type=LIBRARY module=CUSTOM parse=YES userid=apps/apps

To convert from CUSTOM.pll to CUSTOM.plx
f60gen module_type=LIBRARY module=CUSTOM userid=apps/apps

IMP: For R12 files, replace f60gen with frmcmp