private void DisableDS()
{
if ((twainState & TwainStateFlag.DSEnabled) != 0)
{
TwUserInterface guif = new TwUserInterface()
{
ParentHand = hwnd,
ShowUI = false
};
if (tw.DsUserinterface(appId, sources[CurrentScanner], TwDG.Control, TwDAT.UserInterface, TwMSG.DisableDS, guif) == TwRC.Success)
{
twainState &= ~TwainStateFlag.DSEnabled;
}
else
{
throw new Exception(GetTwainStatus());
}
}
}
private TwRC EnableDS()
{
TwRC rc = SetCapability();
if (rc == TwRC.Success)
{
TwUserInterface guif = new TwUserInterface()
{
ShowUI = false,
ModalUI = true,
ParentHand = hwnd
};
rc = tw.DsUserinterface(appId, sources[CurrentScanner], TwDG.Control, TwDAT.UserInterface, TwMSG.EnableDS, guif);
if (rc == TwRC.Success)
{
twainState |= TwainStateFlag.DSEnabled;
}
else
{
throw new Exception(GetTwainStatus());
}
}
return(rc);
}
public static extern TwRC DSuserif([In, Out] TwIdentity origin, [In, Out] TwIdentity dest, TwDG dg, TwDAT dat, TwMSG msg, TwUserInterface guif);
public bool FinishDataSession(TwIdentity dataSourceId)
{
TwUserInterface guif = new TwUserInterface(); // Contents are not used during DisableDS
TwRC rc = LibTwain32.DSuserif(fApplicationId, dataSourceId, TwDG.Control, TwDAT.UserInterface, TwMSG.DisableDS, guif);
return (bool)(rc == TwRC.Success);
}
public bool StartDataSession(TwIdentity dataSourceId, bool showDialog, bool showTransfer)
{
TwUserInterface guif = new TwUserInterface();
guif.ShowUI = (short)(showDialog ? 1 : 0);
guif.ModalUI = 1;
guif.ParentHand = showTransfer ? fWindowHandle : IntPtr.Zero;
TwRC rc = LibTwain32.DSuserif(fApplicationId, dataSourceId, TwDG.Control, TwDAT.UserInterface, TwMSG.EnableDS, guif);
return (bool)(rc == TwRC.Success);
}
internal static extern TwRC DsEntryUserinterface([In, Out] TwIdentity origin, [In, Out] TwIdentity dest, TwDG dg, TwDAT dat, TwMSG msg, TwUserInterface twuserinterface);
public TwRC DsUserinterface([In, Out] TwIdentity origin, [In, Out] TwIdentity dest, TwDG dg, TwDAT dat, TwMSG msg, TwUserInterface twuserinterface)
{
return(DsEntryUserinterface(origin, dest, dg, dat, msg, twuserinterface));
}
private TwRC DsUI([In, Out] TwIdentity origin, [In, Out] TwIdentity dest, TwDG dg, TwDAT dat, TwMSG msg,
TwUserInterface guif)
{
using (new MessageBoxHook())
{
return _DsUI(origin, dest, dg, dat, msg, guif);
}
}
