TW_UINT16
Allows the application and Source to identify which transfer mechanisms they have in common.
The current setting of ICAP_XFERMECH must match the constant used by the application to specify the transfer mechanism when starting the transfer using the triplet: DG_IMAGE /DAT_IMAGExxxxXFER / MSG_GET.
ImageGear will transfer images according to the transfer mechanism an application selects via this capability.
TWSX_NATIVE