Just pass the key name to RegRead and you will get the default value. For instance:.
Shell.RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\CCleaner\")
. \ . , CCleaner HKEY_LOCAL_MACHINE\SOFTWARE. . .reg- .
[HKEY_LOCAL_MACHINE\SOFTWARE]
"CCleaner"="Some string value"
[HKEY_LOCAL_MACHINE\SOFTWARE\CCleaner]
@="some-default-value"