Returns or sets whether the new TWAIN DSM (Data Source Manager) is used for acquisitions.
The new TWAIN DSM is a .dll file called 'TWAINDSM.dll'.
By default, the old DSM is used ('twain_32.dll' under 'C:\Windows').
.IfUseTwainDSM = true;
Set this property before any TWAIN related methods or properties are used.