# Case Labels

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Case labels are VIs with a **c\_** prefix in their filename, identifying them as a Case Label.
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A Case Label is a string constant that is wrapped in a VI, that is a member of a Worker and corresponds to the name of a Worker's MHL case. Case Labels are created automatically by the [Create MHL Case tool](https://docs.workersforlabview.io/workers-tools/quickdrop-shortcuts/create-mhl-case-tool-ctrl+9) when a MHL case is created that is not associated with a Local API Request. An example would be when a MHL case is created to receive a Public Response message from a subWorker. Case Labels are added automatically to a Worker's dedicated **Case Label** folder, as shown in the image below.

<figure><img src="https://2767648102-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZWihGdeYUalj239OUdAB%2Fuploads%2FD1L2iaHI9ImCZ1ovUj2M%2Fimage.png?alt=media&#x26;token=08e1170f-c55f-416b-a016-39da8fa59ca7" alt=""><figcaption><p>Case Label in a Workers project</p></figcaption></figure>

<figure><img src="https://2767648102-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZWihGdeYUalj239OUdAB%2Fuploads%2FtocfDX6KPN1LYTwLljEf%2Fimage.png?alt=media&#x26;token=22430b80-fc28-48f4-80c8-01babf323ee8" alt=""><figcaption><p>Case Label used in a Set Initialization Data VI, used to register a Public Response message with a subWorker.</p></figcaption></figure>