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HRESULT WINAPI SLS_Remove(                                                     LPCSTR pszProductID,                                                     DWORD dwOptions,                                                     SLS_CHALLENGE *pChallenge) Parameters pszProductID Points to a string that uniquely identifies the application's Product ID. dwOptions Instructs how which part of the licence system should be removed. It is a combination of the following values: #define SLS_REMOVE_FILES 0x0001 //remove licence files #define SLS_REMOVE_REGISTRY 0x0002 //remove licence registry #define SLS_REMOVE_HISTORY 0x0004 //remove licence history #define SLS_REMOVE_ALL 0x0007 //remove all of above pChallenge Points to a challenge structure. The licence system does not challenge back. Return Values SLS_SUCCESS if the function is successful. Otherwise an error status code is returned to indicate the cause of the error. Remarks Unlike SLS_Terminate which is designed to enable end users to terminate the licence, SLS_Remove is designed to enable the software publisher to remove the licence. In other words, the difference between "Terminate" and "Remove" is that: SLS_Terminate generates a termination code that the software publisher uses to verify whether the licence has been terminated from the PC, whereas SLS_Remove does not. SLS_Terminate only removes the licence files, whereas SLS_Remove can completely remove all of the licence components including licence files, registry setting and history marks on the PC. See also SLS_GenerateRemovePassword in the Extended API.