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6.5 Example codes
6.5.1
Visual Basic 6.0 project
The project is built around a single form for the user interface and a module to define
the interface to the DLL.
The form code contains necessary initialization steps to make the DLL available from
another directory. It obviously also contain the code for the user interface and
associated calls to the DLL functions.
The module contains the necessary constant and function declarations. It also contains
some helper functions to be used when using helper functions to convert parameter;
these functions take care of memory allocation for the returned strings.
76 – Windows communication DLL for PQ-Link protocol ç RVT communication
RVT_SECL_INVALID_LOGIN
RVT_SECL_LOGIN_FAILURE
RVT_SECL_AUTH_FAILURE
RVT_SECL_TOO_MANY_USERS
RVT_SECL_NOT_LOGGED_IN
RVT_SECL_NOT_ENOUGH_RIGHTS
RVT_PMDB_INVALID_ID
RVT_PMDB_UNAVAILABLE
RVT_PMDB_IO_FAILURE
RVT_PMDB_INVALID_NVRAM
RVT_PMDB_TYPE_MISMATCH
RVT_PMDB_OPERATION_DENIED
RVT_PMDB_INVALID_SIZE
RVT_PMDB_INVALID_CONTENT
RVT_FCT_INVALID_PARAMETER
RVT_FCT_NEEDS_INITIALIZATION
RVT_FCT_OPERATION_FAILED
RVT_FCT_OPERATION_DENIED
RVT_FCT_OPERATION_TIMEDOUT
RVT_FCT_INVALID_RESPONSE
RVT_CMD_UNKNOWN
RVT_CMD_UNSUPPORTED
RVT_CMD_MISMATCH
RVT_LOG_SYSLOG_INVALID_ADDR
RVT_LOG_OPERATION_DENIED
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