use Win32::TieRegistry 0.20 ( UseOptionName=>UseOptionValue[,...] );
 
$Registry->SomeMethodCall(arg1,...);
 
$subKey= $Registry->{"Key\\SubKey\\"};
$valueData= $Registry->{"Key\\SubKey\\\\ValueName"};
$Registry->{"Key\\SubKey\\"}= { "NewSubKey" => {...} };
$Registry->{"Key\\SubKey\\\\ValueName"}= "NewValueData";
$Registry->{"\\ValueName"}= [ pack("fmt",$data), REG_DATATYPE ];