Hi,

Thanks for the clue!

Btw,

1) I add my own toolbar to my Development desktop like this:

_SCREEN.ADDPROPERTY("oToolKitsBar", NEWOBJECT([hc_DevTbr], pcPATHhlib + [hcDevp.vcx]))

(Thanks Sergey Berezniker for his clue on how to do this in Message ID: 810924)

2) I also add my sound system player class to _SCREEN like the below:

_SCREEN.NEWOBJECT([_SndSys], [hc_SndSys], [hcSond.VCX])

When I need to plug something to _SCREEN, technically, do you know what is the major difference between 1) and 2)? or is there any advantage or disadvatage by doing the "plug to _SCREEN" in either way?