//identifies the card to be closed. Returned from we_OpenCard
);
Summary
The we_CloseCard function closes the specified card and releases information
stored about that card.
Parameters
Handle:
Identifies the card to be closed. This value is returned from
we_OpenCard.
Return Values
If the card was successfully closed, the function will return 0 to indicate
success. If an error occurs, a negative error code will be returned. Errors
that may be returned include:
WECRD_INVALID_HANDLE - The card was never opened or has already been closed
More Information
When an I/O card is opened with we_OpenCard, certain information about
that card such as its base address and card type is stored in the Portal API.
This information signifies to the API that that particular card is currently
in use. If there is another attempt to open the same card, it will fail
and an error code will be returned. However, when we_CloseCard is called,
it signifies to the API that the card is no longer in use. The card is
then free to be reopened with we_OpenCard.