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RegValueExists

Declaration: RegValueExists (RootKey: TRegRootKey; SubKey, ValueID: string): boolean;
The function RegValueExists checks whether the specified value of the Windows registry exists. The parameter RootKey defines the root key. The parameter SubKey specifies the key (including its path) used within the branch of the root key and the parameter ValueID specifies the value to be checked.

The function returns TRUE if the specified value exists.