DropList install option with list of com ports

Is it possible to have an install option of type DropList with the ListItems being a list of com ports available on the target machine?

Found a solution getting values from registry:

Function GetComPorts

	StrCpy $0 0

getNextReg:

	EnumRegValue $1 HKLM "HARDWARE\DEVICEMAP\SERIALCOMM" $0

	StrCmp $1 "" gotRegs

	ReadRegStr $2 HKLM "HARDWARE\DEVICEMAP\SERIALCOMM" $1

	StrCmp $0 0 create

	StrCpy $3 "$2|$3"

	goto appended



create:

	StrCpy $3 $2

	

appended:

	IntOp $0 $0 + 1

	goto getNextReg

	

gotRegs:	

	!insertmacro MUI_INSTALLOPTIONS_WRITE "ComSelectionPage.ini" "Field 1" "ListItems" $3

FunctionEnd

where Field 1 is a DropList