Is there a good twain example?

Sorry. I should have been more descriptive.  We are using v14.5 and are building classes in C# which wrap the Leadtools objects.  I cannot find any .Net example (VB or C#) that sets the DPI, sets the bits per pixel, and sets the file transfer properties on one scan method.  I found places where they are described independently...and they seem to work independently, but when I put them together I get very strange behavior such as a scan occurring twice.  Could you provide some sample code which performs all three of these tasks?  The concept seems extremely simple, but yet, the Leadtools objects are not working as expected.  I would assume that means I am setting things out of order or something.  Here is a simple method I was trying to implement.  I could not get the capabilities to work so I tried the TwainImageResolution object instead.  Also, I would need instructions for control on how to handle images for multipage scans...I think all of that ties together with the fact that I get multiple pages when scanning one page with the multipage parameter set to false.

try

if(optionalTwainSourceName != "" && optionalTwainSourceName != null)

// Set twain device based on what was passed in.

else

// No option sent, default to first twain device.

_returnFile = _imageDir + System.Guid.NewGuid() + ".tif";

_twSession.FastUsePreferredBufferSize = true;

_twSession.EnableAcquireMultiPageEvent = false;

TwainImageResolution tir = new TwainImageResolution();

tir.Unit = (int)TwainCapabilityValue.UnitInches;

_twSession.AcquireFast(_returnFile, ((_showTwainInterface == true) ? TwainFastUserInterfaceFlags.Show : TwainFastUserInterfaceFlags.None), _multiPage);

Thanks for the app, but it does not run for me.  I get the following.  I tried commenting the various properties being set to narrow it down, but the error still occurs.  Any ideas?

{"Required capability not supported" }

[Leadtools.Twain.TwainException]: {Leadtools.Twain.TwainException}

System.Object: {Leadtools.Twain.TwainException}

_className: null

_COMPlusExceptionCode: -532459699

_exceptionMethod: {System.Reflection.RuntimeMethodInfo}

_exceptionMethodString: null

_helpURL: null

_HResult: -2146232832

_innerException: { }

_message: "Error in the application."

_remoteStackIndex: 0

_remoteStackTraceString: null

_source: "Leadtools.Twain"

_stackTrace: {System.Array}

_stackTraceString: " at Leadtools.Twain.TwainException.CheckErrorCode(Int32 code)\r\n at Leadtools.Twain.TwainSession.AcquireFast(String baseFileName, TwainFastUserInterfaceFlags flags, Boolean multiPage)\r\n at Twain1.Form1.buttonAcquire_Click(Object sender, EventArgs e) in c:\\david\\testapps\\c_twain_example\\form1.cs:line 262"

_xcode: -532459699

_xptrs: 0

HelpLink: null

HResult: -2146232832

InnerException: { }

Message: "Required capability not supported"

Source: "Leadtools.Twain"

StackTrace: " at Leadtools.Twain.TwainException.CheckErrorCode(Int32 code)\r\n at Leadtools.Twain.TwainSession.AcquireFast(String baseFileName, TwainFastUserInterfaceFlags flags, Boolean multiPage)\r\n at Twain1.Form1.buttonAcquire_Click(Object sender, EventArgs e) in c:\\david\\testapps\\c_twain_example\\form1.cs:line 262"

TargetSite: {System.Reflection.RuntimeMethodInfo}

I found the line it was popping on.

Are there any patches available?  When I go to the support site, the only thing posted is this

"Patch Files
At this time, LEAD does not create patches files for Capture & Convert, Capture & Present, ePrint or any of the LEAD codecs. Direct notification will be provided to owners of these products if upgrades or new releases are available. If you have any questions, you may search the support forums or contact support@LEADTOOLS.com. "