The nsIWindowsRegKey interface provides the childCount, getChildName(), valueCount, and getValueName() properties and methods for enumerating keys and values respectively. You can use these methods to read a list of values or recursively access a branch of the registry. This example reads all the startup programs in one key of the registry. In practice, manual manipulation of the registry might be required where applications that are using the Registry do not implement configuration through their user interface. The operation is transparent to the application, as it does not know that its Registry operations have been directed elsewhere.
Types Of Information In The Registry
The most likely culprit is performance, though there is some marginal claim that it was done for space reasons. When we switched not long after PDC to a binary format for the file manifest, it did indeed result in a significantly smaller file, but more importantly, it improved performance quite dramatically. The haxors who had earlier tinkered with the WIM format accused us of changing to binary to foil them. So I think Apple likely changed primarily for performance, regardless of what was said.
How Is The Registry Structured?
Because we use theCurrentUser subkey, we will allow every user to have his own window size based on his preferences (in this case the size of the window when the application was closed). In some situations, you may want to enumerate a number of keys or values whose names you do not know.
- All of the system-wide settings are stored here, and it is usually abbreviated as HKLM.
- The registry hacking file format is pretty simple – value names on the left, and actual values on the right.
- You also can’t easily access the files themselves on the hard drive, because they are completely locked.
- You can export registry keys and all of the values contained underneath them by right-clicking on a key and choosing Export.
- This is really important if you are going to be making changes to your system.
- For more on registry hack files, make sure to read our guide on the subject.
Finally, these were text files all over the disk, used by applications on a slow Windows system. In the following example, we will use the Registry for storing some user-specific settings. More specifically, we will store the size of the application’s window and retrieve it the next time the application starts.
A Windows system with a few applications on it could have dozens of ini files. Securing, backing up, or xlive.dll managing these before NT (really before Windows 2000) was a challenge and realistically an intractable problem.
To create a new value, right-click in the right pane and select the value depending on your needs as discussed above. Once the value is created, you need to name it; the name depends entirely upon the specific requirement. But do note that if you select the option “Key” in the right-pane, Windows Registry will automatically create a new Sub-Key. Each of the above Root Keys has their own Keys, and each Key has its own values. For each Key, you can create six different values, and those values depend entirely upon the target program and/or the configuration requirements.