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OCR: Procedure/Function Purpose InitUsageCode Using key, d'usage count, and an expiration date Initializesion appropriate teletse code: IsUsageCodevalid Boolean function that returns Tue if brage code is valid 'sUsage codeExpired Boolean function that returns moveairesdgr codo is expired ,, GetUsageCadevalue Longint function that returns currenttvalue bf wsage code? DecUsageCode Using key and current release code idea oments remaining usages and returns a new value Figure 9: TOgUsageCode's low-level procedures and functions.