Registry is stored under UNKNOWN key

[juliankay]

Registry is stored under UNKNOWN key

[maphew]

During driver install in the wizard I chose 'Sensor' instead of the default 'Show All Devices'.
As a result the registry key is HKLMSYSTEM\CurrentControlSet\Enum\ROOT\SENSOR\FakeGPS.

ChatGPT has this to say about how to specify the registry location in the .inf file. I might get around to testing it later; no promises. ;-)

...
In a Windows legacy device driver .inf file, the property that sets the registry key location is typically defined within the [AddReg] section. This section is used to specify additions or modifications to the system registry. Entries in the [AddReg] section can define new registry keys, set registry values, or modify existing ones.

Here's how it works:

1. Registry Section Name: Within the [AddReg] section of the .inf file, you specify one or more sub-section names that contain the registry settings you want to apply.

2. Sub-section Details: Each sub-section specifies:

   • The root key (such as HKR for HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum<device-instance-id>).
   • The subkey path relative to the root key.
   • The name of the value to be set.
   • The type of the value (e.g., REG_SZ for a string, REG_DWORD for a 32-bit number).
   • The data or value to be set.

3. Example:

   [AddReg]
   ; Sub-section name
   0x00000002,"SubKeyName","ValueName",0x00010001,1

   • 0x00000002 specifies the root key (HKR in this case).
   • "SubKeyName" is the path to the subkey under the root.
   • "ValueName" is the name of the registry value.
   • 0x00010001 specifies the type of the value (REG_DWORD).
   • 1 is the data to be set for the registry value.

Using the [AddReg] section in this way allows the .inf file to specify exactly where in the registry the key should be set or modified, providing a robust method for configuring device-specific settings upon driver installation.