| 
   Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits.  | 
LEADTOOLS has defined the following data types for referencing TWAIN session:
| 
 Data Type  | 
 Definition and Usage  | 
| 
 HTWAINSESSION  | 
 Defined as HANDLE; used as a handle of a TWAIN session.  | 
| 
 pHTWAINSESSION  | 
 Defined as HTWAINSESSION *; used as a pointer to a TWAIN session handle.  |