Dealing with the Windows Registry
WinReg is a member of the APLTree library. The library is a collection of classes etc. that aim to support the Dyalog APL programmer. Search GitHub for "apltree" and you will find solutions to many every-day problems Dyalog APL programmers might have to solve.
This class offers methods useful to deal with the Windows Registry without using .NET. It uses
⎕NA calls to the appropriate Windows API.
WinReg is a powerful class that offers plenty of methods. If you just want to read, write and/or delete values from the Windows Registry then the much smaller class WinRegSimple might be sufficient.
To understand the names of the methods you need to understand the terminology. If you find the terminology strange: so do I, but it was invented by Microsoft and therefore defines the standard. That is the reason why I decided to go for it: it makes it easier to understand the Microsoft documentation but also to understand others while talking about the Windows Registry.
In this picture:
you can see this string:
HKEY_CURRENT_USER\Software\Dyalog\Dyalog APL/W 12.0 Unicode\AutoComplete
at the top of the window.
This is called a "Main key". There are a number of pre-defined main keys available you can choose from. There is also a shortcut available: instead of '''HKEY_CURRENT_USER''' you can use '''HKCU'''.
SOFTWARE\Dyalog\Dyalog APL/W 12.0 Unicode
This is called a '''sub key'''.
On the right side you see a list. The entries in this list are called values. Therefore "CancelKey1" is a value.
Note that the names are called values; the actual data saved under a value is called data.
Close CopyTree DeleteSubKey DeleteSubKeyTree DeleteValue DoesKeyExist DoesValueExist Close CopyTree Copyright DeleteSubKey DeleteSubKeyTree DeleteValue DoesKeyExist DoesValueExist GetAllSubKeyNames GetAllValueNames GetAllValues GetDyalogRegPath GetErrorAsStringFrom GetString GetTree GetTreeWithValues GetTypeAsStringFrom GetValue History KeyInfo ListError ListReg OpenAndCreateKey OpenKey PutBinary PutString PutValue ReadByte
Note the following restrictions:
PutValuesupports DWORDs (REG_DWORD)
GetStringsupport strings (REG_SZ), nested strings (REG_MULTI_SZ) and expanded strings (REG_EXPAND_SZ)
GetValuesupports all data types.
Other data types can be requested via
GetValue; however, writing them is not supported.