←Select platform

SetVersion Method

Summary

Sets the desired TWAIN version with which to work.

Syntax

C++

public static void SetVersion(  
   Leadtools.Twain.TwainVersion twainVersion 
)

Public Shared Sub SetVersion( _ 
   ByVal twainVersion As Leadtools.Twain.TwainVersion _ 
)

public: 
static void SetVersion(  
   Leadtools.Twain.TwainVersion twainVersion 
)

Parameters

twainVersion
The TWAIN version to set. See TwainVersion for a list of available versions.

Remarks

This method overrides the default TWAIN (version 2) used for scanning. This allows the TWAIN version to be changed without having to rename or delete any of the TWAIN version DLLs from the system directory. The TWAIN version 1 DLL name is Twain_32.dll and the version 2 DLL name is TWAINDSM.DLL. If this method is not called the engine will keep the default behavior and look for TWAIN version 2 first. If version 2 does not exist it will then look for TWAIN version 1. If this method is called and returns SUCCESS there is no need to call Leadtools.Twain.TwainSession.IsAvailable since this internally calls it. For more information, refer to Setting Which TWAIN SpecificationVersion to Use.

Example

Imports Leadtools 
Imports Leadtools.Twain 
 
Public Sub SetVersionExample(parent As IntPtr, twainVersion As TwainVersion) 
   Dim session As New TwainSession() 
   Try 
      TwainSession.SetVersion(twainVersion) 
      session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None) 
   Catch ex As Exception 
      MessageBox.Show(ex.Message) 
   End Try 
 
   session.Shutdown() 
End Sub

using Leadtools; 
using Leadtools.Twain; 
 
public void SetVersionExample(IntPtr parent, TwainVersion twainVersion) 
{ 
   TwainSession session = new TwainSession(); 
   try 
   { 
      TwainSession.SetVersion(twainVersion); 
      session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None); 
   } 
   catch (Exception ex) 
   { 
      MessageBox.Show(ex.Message); 
   } 
 
   session.Shutdown(); 
}