Question: my application is asp.net I am passing a variable from the controller to a view using:

```
 public ActionResult Create(long? learnerID)
    {
        learnerID = 211;
        ViewBag.learnerID = learnerID.Value;
        return View();
    }

```

In the view:

```
 <input type="text" value="<%=  ViewBag.learnerID %>" id="Learner_ID" name="Learner_ID" />

```

The value 211 shows in form and I can save it, however if I change the input type to hidden or use style="display:none" I get the following error:

```
The call is ambiguous between the following methods or properties: 'System.IO.TextWriter.Write(string, params object[])' and 'System.IO.TextWriter.Write(char[])'

```

Would appreciate your suggestions. Thanks in advance.

Answer: 
There is no easy way to develop VST plugins, they require knowledge of advanced signal processing and programming.

Here are some links that can help you out with your plugin development

[KVR Audio: DSP / Plugin / Host Development](http://www.kvraudio.com/forum/viewtopic.php?t=30071&sid=702bf56e5331dc6b97c4a7bddce04065)  

[KVR Audio: How To Create VST Plugins](http://www.kvraudio.com/forum/viewtopic.php?f=33&t=329696)

For JUCE C++ Framework there aren't many full featured tutorials as such so you will have to learn by reading code and understanding it. 

For Filter Design I would suggest checking out **DSPFilters** by vinniefalco. This is a collection of C++ classes for signal processing. It uses JUCE C++ Framework. So I suggest you check that out.

<https://github.com/vinniefalco/DSPFilters>

You can also check out TAL Plugins. Some of these plugins were made with JUCE C++ and their source code is available for free on their website.

For the Filter there is Tal-Filter, download is underneath source code section.

<http://kunz.corrupt.ch/Products/TAL-Filter>

For a Subtractive Synth Tal-NoiseMaker, download for source code is underneath source code section.

<http://kunz.corrupt.ch/Products/TAL-NoiseMaker>

Both of these plugins source code are open source and are using JUCE C++ Framework.
Nowadays I recommend using [WDL](http://www.cockos.com/wdl/) instead of JUCE. WDL is free for commercial use, and you can build Win/Mac, 32/64 Bit, VST2/VST3/AU/RTAS/AAX and standalone from one codebase.

There's a [tutorial series](http://martin-finke.de/blog/tags/making_audio_plugins.html) showing how to get started.