IsAvailable Method

Summary

Determines whether a TWAIN source is installed.

Syntax
C#
VB
C++
public static bool IsAvailable( 
   IntPtr owner 
) 
Public Shared Function IsAvailable( _ 
   ByVal owner As IntPtr _ 
) As Boolean 
public: 
static bool IsAvailable(  
   IntPtr owner 
)  

Parameters

owner
Window handle of the application window.

Return Value

true if at least one TWAIN source is installed, false if no TWAIN source is installed.

Remarks

As an example, this method can be used to enable or disable the TWAIN menu items.

Example
C#
VB
using Leadtools; 
using Leadtools.Twain; 
 
public void IsAvailableExample(IntPtr parent) 
{ 
   bool twainAvailable = TwainSession.IsAvailable(parent); 
   if (twainAvailable) 
      MessageBox.Show("Twain is installed"); 
   else 
      MessageBox.Show("Twain is not installed"); 
} 
Imports Leadtools 
Imports Leadtools.Twain 
 
Public Sub IsAvailableExample(ByVal parent As IntPtr) 
   Dim twainAvailable As Boolean = TwainSession.IsAvailable(parent) 
   If twainAvailable Then 
      MessageBox.Show("Twain is installed") 
   Else 
      MessageBox.Show("Twain is not installed") 
   End If 
End Sub 

Requirements

Target Platforms

Help Version 20.0.2019.9.19
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Leadtools.Twain Assembly