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Mabry EncoderX 1.00.011 $1 buy download

Mabry Software's Encoder/X ActiveX control and COM object provides an easy and powerful way to handle the data encoding formats used by various Internet protocols. The four basic encoding types used by protocols such as mail and news are Base64, BinHex 4.0, Quoted-Printable, and UU. Encoder/X provides a number of functions to convert back and forth between binary (or text) data and any of these formats.

The Encoder/X control provides unlimited flexibility when it comes to specifying source and destination for the data being encoded or decoded. The following methods fulfill basic requirements: FileToString, FileToFile, StringToFile, and StringToString. In addition, Encoder/X utilizes our new Streams technology to provide a fully extensible way of accessing and storing encoded/decoded data.

Our Streams objects include the following: MemStream, VirtualMemStream, and FileStream. Any of these can be used by Encoder/X's StreamToStream method. And there are StreamToFile, StreamToString, FileToStream, and StringToStream methods. If, for instance, you have a file containing a huge amount of data, you could create a VirtualMemStream and then use the FileToStream method to decode the data. Using this technique, you can easily access many tens of megabytes of data.

Encoder/X also makes use of the IMStream interface. The Encoder and Decoder objects Implement the IMStream interface, and each of them has an In property to which an IMStream object can be assigned. This makes it easy to perform a number of conversion jobs. For instance, if you need to convert UU encoded data stored in a file to Base64 in memory, you could do that easily by following this procedure:

1. Create a FileStream for the source data to be decoded

2. Assign the source stream to the Decoder's In property

3. Set the Decoder's EncodingType property to UUencoding

4. Assign the Decoder Out itself to the Encoder's In property (this works because both Encoder and Decoder Implement the IMStream interface).

5. Use the Encoder's IMStream interface's Read method to read data from the Encoder.

To explain - when you call the Encoder's Read method, it calls the Decoder's Read method to get some data to encode. The Decoder decodes the data and returns it to the Encoder that encodes the data and returns it to your program.

Of course, there are a number of ways to accomplish this same task using Encoder and Decoder. You will be able to choose the way that works best for you in any given situation.

And for those of you who have _really_ large amounts of data to encode or decode, Encoder and Decoder objects provide background processing on a separate thread! If you set the Blocking property to False and call one of the methods, the method call will return immediately, and the method itself will begin executing in the background. As data is encoded or decoded, Progress events fire so the programmer can provide a visual indicator to the user. When the method has finished, the Done event fires.

And, last but not least, Encoder/X comes in both Active/X Control and COM Object versions. We strongly recommend using the COM object wherever possible. It's smaller, slightly faster, and doesn't impact form load times.

Mabry Software's Encoder/X provides the most versatile and powerful Encoder and Decoder objects available.

About Encoding

Encoding Basics

For historical reasons, there are e-mail systems on the Internet that are not able to correctly transmit and/or receive e-mail messages containing 8-bit data. Instead, they can process only 7-bit data.

Restricting data to 7 bits was fine when only text messages were being transported. But now we want to transmit everything - images, pictures, sound, etc. Such items are transmitted as attachments. Since these attachments require that each byte's 8 bits are transmitted, it is necessary to have a way to convert collections of 8-bit data into 7-bit data to accommodate the 7- bit e-mail systems.

Note: in the context of e-mail programs, encoding refers to the process of turning 8-bit data into 7-bit data. Decoding refers to the inverse operation.

Types of Encoding

There are four types of encoding commonly used in email messages: Base64, Bin Hex 4.0, UUencode, and Quoted-Printable, all of which are supported by the Mabry Encoder/Decoder objects and controls.

Base64 is the preferred encoding format. Base64 works very well and has none of the problems associated with the other formatting schemes. Unless there is some unusual compelling circumstance, you will want to use Base64 to encode messages. But you must also give users of your program the option to select other encoding types. Some e-mail clients have limited capabilities and demand UUencode or one of the other methods.

Bin Hex 4.0 is rarely used since it is really a Macintosh format.

UUencode preceded Base64 and is very similar except that it suffers from multiple almost-the- same implementations - no doubt a result of its origins in multiple almost-compatible UNIX systems. But again, you must be prepared to receive UUencoded email. UUencoding also suffers from a deficiency in its encoding scheme in that certain characters it uses may be modified as the email passes through various systems - especially those that convert ASCII to EBCDIC. For these reasons, avoid UUencode whenever possible.

Quoted-Printable is not suitable for encoding large amounts of data because it uses three 7-bit characters to encode one 8-bit character (Base 64, Bin Hex 4.0, and UUencode use 7-bit characters to encode every three 8-bit characters). However, messages encoded with Quoted-Printable are seen from time-to-time and your program must be prepared to decode them.

About Streams

What Are Streams?

Streams are used to store data. Three standard stream types are provided by Mabry: MemStream, FileStream, and VMemStream. Each type has different characteristics in terms of speed, memory usage, and easy persistence.

Any object that implements the IMStream Interface has access to one of the five IMStream Interface methods: Read, Write, Seek, Clone, and Copy. See the IMStream Interface documentation for more details.

When Should I Use Streams?

The Mail/X Message and Part Objects both expose a BodyStream property. When a new Message or Part is created, the BodyStream property can be used to access a MemStream Object.

If you have a file and you want to send its encoded contents in a given message, you can use the FileToStream method to encode the contents of the file and place the result in the stream. Later, when the message is transmitted, the contents of the stream will be sent.

But what if you have one or more huge attachments? Fifteen megabytes or more are often seen now that high-bandwidth connections are becoming the norm. The encoded data is going to total 20 megabytes and, while it is possible to use the default MemStream Object, it is hardly a good idea. In such cases you can create either a VMemStream, which uses virtual memory, or a FileStream. Then you use the Encoder's FileToStream method, as before, and assign the stream to the Message's BodyStream property.

Because the encoded data is stored on the disk in a temporary file, very little RAM is used - and the programming model hasn't changedt, making it easy to make on-the-fly choices regarding the type of stream to use in a given situation.


The samples in this section are intended to demonstrate only the basic uses of the Encoder and Decoder objects. More complicated uses are demonstrated in the sample programs included with the Encoder/X package.

Visual Basic

Encoding A File

This sample demonstrates how to encode a file and place the encoded data into a FileStream object. Note: your VB project must reference the Encoder/Decoder and Stream objects in order to implement this code.

Create objects

Dim Encoder As New Encoder
Dim DstStream As New FileStream

Trap errors!

On Error Resume Next
Encoder.FileToStream "c:\somefile.exe", DstStream
If (Error) Then
MsgBox "Encoder failed - " &
End If

See what our customers have to say about Encoder/X.

View Encoder/X's release notes.

ActiveX Control (32-bit OCX)
Compatibility VB 5.0 and 6.0, VC 5.0 and 6.0,
Access 95 and above, VFP 5.0 and 6.0
Built Using Microsoft Visual C++ v6

Control Elements Controls


Download File Size:1002.21 KB

Mabry EncoderX 1.00.011
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