These are all the possible flags for the IG_ISIS_drv_load function.
| IG_ISIS_DRV_LOAD_DIRECT | If unset than a filename is specified for the driver. If set, then a proc instance of a driver function is specified. |
| IG_ISIS_DRV_LOAD_NEED_PAGESIZE | Whether to get pagesize from the driver if unset, or if set provide IG_ISIS_TAG_PAGESIZE even if the scanner driver did not implement it. |
| IG_ISIS_DRV_LOAD_NO_FILTERS | If unset filters are loaded as specified in SETSCAN.ini. If set filters are not loaded. |
| IG_ISIS_DRV_LOAD_FORCE_PROPER_PATH | |
| IG_ISIS_DRV_LOAD_SUPPRESS_DIALOG | If unset the driver was already in memory and was not loaded from or from this application's executable directory, display a warning message to the user and load another instance only if the user wants to proceed. If set instead do not display warning dialog upon loading another instance of a driver that was already loaded from the "wrong" place. |