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A c-tree data file that requires a record-update callback DLL would fail to open with error code 981 if the callback DLL could not be loaded. In some cases, it might be desirable to allow the data file to be opened in this situation. This is now permitted.
An extended file open mode has been added. It can be used to permit the data file to be opened for read-only access if its record-update callback DLL cannot be loaded. The new extended file mode is ctXOPN_NORUCB_OK. To use this mode when opening the file, call SetXtdFileOpenMode(ctXOPN_NORUCB_OK) before opening the file.
Note that the extended file mode set by SetXtdFileOpenMode() overwrites any previous extended file mode that was set for the connection. Upon return from the file open call, the extended file mode is reset to zero. This implies the normal usage of this function is to call it right before opening the file.
Note: Although the file open succeeds in this situation, the file open function sets sysiocod to RUCBDLL_NOT_LOADED_COD, and a message such as the following one is logged to CTSTATUS.FCS indicating the failed DLL load:
CTDLL_LOAD: Failed to load module ctuser.dll: The specified module could not be found.
