Public Shared Function IsAvailable( _
   ByVal owner As IWin32Window _
) As Boolean

Dim owner As IWin32Window
Dim value As Boolean
 
value = TwainSession.IsAvailable(owner)

public static bool IsAvailable( 
   IWin32Window owner
)

public:
static bool IsAvailable( 
   IWin32Window^ owner
) 

Public Sub IsAvailableExample(ByVal parent As IWin32Window)
   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

public void IsAvailableExample(IWin32Window parent)
{
   bool twainAvailable = TwainSession.IsAvailable(parent);
   if (twainAvailable)
      MessageBox.Show("Twain is installed");
   else
      MessageBox.Show("Twain is not installed");
}