Public Function GetDeviceEventCapability() As TwainCapability

Dim instance As TwainSession
Dim value As TwainCapability
 
value = instance.GetDeviceEventCapability()

public TwainCapability GetDeviceEventCapability()

public:
TwainCapability^ GetDeviceEventCapability(); 

Public Sub GetDeviceEventCapabilityExample(ByVal parent As IWin32Window)
   Dim session As TwainSession = New TwainSession()
   session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None)

   Try
      Dim twnCap As TwainCapability = session.GetDeviceEventCapability()
      If twnCap.Information.Type = TwainCapabilityType.DeviceEvent Then
         Dim count As Integer = twnCap.ArrayCapability.Count
         Dim i As Integer

         For i = 0 To count - 1
            Dim capValue As TwainCapabilityValue = CType(twnCap.ArrayCapability.GetValue(i), TwainCapabilityValue)
            Select Case capValue
               Case TwainCapabilityValue.DeviceEventCheckBattery
                  MessageBox.Show("Device event checks the battery")
               Case TwainCapabilityValue.DeviceEventCheckResolution
                  MessageBox.Show("Device event checks the resolution")
               Case TwainCapabilityValue.DeviceEventDeviceReady
                  MessageBox.Show("Device event is ready")
            End Select
         Next

         Dim cap As TwainCapability = New TwainCapability()
         cap.Information.Type = TwainCapabilityType.DeviceEvent
         cap.Information.ContainerType = TwainContainerType.Array

         cap.ArrayCapability.Count = 5
         cap.ArrayCapability.ItemType = TwainItemType.Uint16
         cap.ArrayCapability.SetValue(0, TwainCapabilityValue.DeviceEventDeviceReady)
         cap.ArrayCapability.SetValue(1, TwainCapabilityValue.DeviceEventCheckDeviceOnline)
         cap.ArrayCapability.SetValue(2, TwainCapabilityValue.DeviceEventCheckBattery)
         cap.ArrayCapability.SetValue(3, TwainCapabilityValue.DeviceEventCheckPowerSupply)
         cap.ArrayCapability.SetValue(4, TwainCapabilityValue.DeviceEventCheckResolution)

         session.SetDeviceEventCapability(cap)
         MessageBox.Show("DeviceEvent is changed successfully")
         session.ResetDeviceEventCapability(twnCap)
         MessageBox.Show("DeviceEvent is reset to default values successfully")
      End If
   Catch
   End Try
   session.Shutdown()
End Sub

public void GetDeviceEventCapabilityExample(IWin32Window parent)
{
   TwainSession session = new TwainSession();
   session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None);

   try
   {
      TwainCapability twnCap = session.GetDeviceEventCapability();
      if (twnCap.Information.Type == TwainCapabilityType.DeviceEvent)
      {
         int count = twnCap.ArrayCapability.Count;
         for (int i = 0; i < count; i++)
         {
            TwainCapabilityValue capValue = (TwainCapabilityValue)twnCap.ArrayCapability.GetValue(i);
            switch (capValue)
            {
               case TwainCapabilityValue.DeviceEventCheckBattery:
                  MessageBox.Show("Device event checks the battery");
                  break;
               case TwainCapabilityValue.DeviceEventCheckResolution:
                  MessageBox.Show("Device event checks the resolution");
                  break;
               case TwainCapabilityValue.DeviceEventDeviceReady:
                  MessageBox.Show("Device event is ready");
                  break;
            }
         }

         TwainCapability cap = new TwainCapability();
         cap.Information.Type = TwainCapabilityType.DeviceEvent;
         cap.Information.ContainerType = TwainContainerType.Array;

         cap.ArrayCapability.Count = 5;
         cap.ArrayCapability.ItemType = TwainItemType.Uint16;
         cap.ArrayCapability.SetValue(0, TwainCapabilityValue.DeviceEventDeviceReady);
         cap.ArrayCapability.SetValue(1, TwainCapabilityValue.DeviceEventCheckDeviceOnline);
         cap.ArrayCapability.SetValue(2, TwainCapabilityValue.DeviceEventCheckBattery);
         cap.ArrayCapability.SetValue(3, TwainCapabilityValue.DeviceEventCheckPowerSupply);
         cap.ArrayCapability.SetValue(4, TwainCapabilityValue.DeviceEventCheckResolution);

         session.SetDeviceEventCapability(cap);
         MessageBox.Show("DeviceEvent is changed successfully");
         session.ResetDeviceEventCapability(twnCap);
         MessageBox.Show("DeviceEvent is reset to default values successfully");
      }
   }
   catch
   { }

   session.Shutdown();
}