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There are 3 items that SpecView registers for DDE under the Status topic:

LastError        The last reason for failure of a DDE request.

ErrorItem        The item that caused the above failure

PokeStatus        The running Status of the current (or last) poke command.

NOTE: The upper/lower case of the requests is significant (unlike the variables).

Examples:

1)        Suppose a request is made for 'Specview|var!ANameThatDoes.NotExist'.

This will cause 'LastError' to be set to 'Unknown Variable' and

'ErrorItem' to be set to 'ANameThatDoes.NotExist'.

2)        A DDEPoke request to set a setpoint above the Setpoint High Limit for that particular instrument might result in the final PokeStatus being 'Write Error 18023'.

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