uFlags
Flag that indicates the capability values to get when enumerating the TWAIN capability. Possible values are:
| Value | Meaning | 
| LTWAIN_CAPABILITY_DONTGET | [0] Get no capability values. | 
| LTWAIN_CAPABILITY_GETCURRENT | [3] Get the current capability value. | 
| LTWAIN_CAPABILITY_GETDEFAULT | [4] Get the default capability value. | 
| LTWAIN_CAPABILITY_GETVALUES | [5] Get all available capability values. |