Regedit file format

Question

I would like to document the file format of regedit utility, so data can be merged into the registry.

From the command-line you can (silently) merge data from a batch file like this:

regedit /s file.reg

Exporting from a subkey goes like this:

regedit /e file.reg "HKEY_XX\key"

Answer 1

Remove keys and values by using the minus sign (-).

REGEDIT4
[-HKEY_CURRENT_USER\RemoveThisTree]
[HKEY_CURRENT_USER\RemoveValue]
"valueName"=-

Answer 2

Documenting the .reg file format is really more Microsoft's job.

Answer 3

Have a look at wotsit.org and search for "reg". You can download a relatively good documentation for "Windows Registry File Format (ASCII .REG format)" by Jeroen Mostert there.

Answer 4

Use Reg apis.