|   | 
Reads a string setting from the windows registry. Currently this function can only read settings in the HKEY_CURRENT_USER and HKEY_LOCAL_MACHINE top level trees.
| Number | Type | Compulsory | Default | Description | 
|---|---|---|---|---|
| 1 | string | Yes | 
 | Key name | 
| 2 | string | Yes | 
 | Value name | 
| 3 | string | No | 'HKCU' | Top level tree | 
Name of key. This must be a full path from the top level. E.g. 'Software\ SIMetrix\'
Name of value to be read.
Top level tree. This may be either 'HKEY_CURRENT_USER' or 'HKEY_LOCAL_MACHINE' or their respective abbreviations 'HKCU' and 'HKLM'.
Return type: string
Returns value read from the registry. If the value doesn't exist, the function returns an empty vector.
| 
 | ||