OH Syntax
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OH uses the following syntax:

oh [/p ClientID] [/t TypeName] [/o FileName] [/a] [Name] [/?]

Parameters

/p ClientID

Displays open handles for the process with an ID of ClientId.

/t TypeName

Displays open object names of the specified type. Examples include Key, File, Directory, Desktop, Semaphore, Mutant, Section, Event, Thread.

Note

Use the /a parameter to display unnamed objects of the specified type.

/o FileName

Specifies the name of the file that writes output.

/a

Includes objects with no name.

Name

Displays handles that contain the specified name.

/?

Displays command-line Help.