public string SetRegistryValue(string ValueName,
	string Value,
	string Node);

ValueName
The name of the Value in the Registry.

Value
The value to store.

Node
The name of the node in the Registry to store the value in. If a value is passed and it doesn't contain a backslash (), that node is used instead of Options. For example, specifying "Data" means that HKEY_CURRENT_USER\Software\CompanyName\ApplicationName\Data is used. If it does contain a backslash, then it must be a complete path to any place in the Registry, such as HKEY_LOCAL_MACHINE\Software\Whatever\SomeNode.