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Enum Registry Keys (G Dataflow)

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Last Modified: December 18, 2017

Enumerates subkeys of a specific key or subkey.

spd-note-caution
Caution  

Incorrectly modifying the registry can damage Windows or prevent you from starting Windows.

Programming Patterns

You can wire the subkey info output of the Query Registry Key Info node to the Enum Registry Keys node to get the subkey information of a specific key or subkey.

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reference in

Reference to the open registry key.

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subkey info

Set of parameters describing the subkey associated with reference in.

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numSubKeys

Number of subkeys under the key specified by hKey.

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maxSubKeyLen

Length of the longest subkey name under the key specified by hKey.

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maxSubKeyClassLen

Length of the longest class name under the key specified by hKey.

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error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

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reference out

Reference to the open registry key.

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subkeys

An array of the names of all subkeys of the specified key.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: This product does not support FPGA devices

Web Server: Not supported in VIs that run in a web application

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