Returns the license key string.
PRL_RESULT PrlLic_GetLicenseKey( PRL_HANDLE hLicense, PRL_STR sLicenseKey, PRL_UINT32_PTR pnLicenseKeyBufLength );
PrlApiDisp.h
PRL_RESULT. Possible values are:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_BUFFER_OVERRUN - the size of the output buffer is not large enough. The parameter that is used to specify the size will contain the required size.
PRL_ERR_NO_DATA - the specified license object does not contain license data.
PRL_ERR_SUCCESS - function completed successfully.