Vb6 write binary data to file

It makes sense however to do it write and be aware of certain traps like not omitting the use of the FreeFile function or knowing the difference between Print and Write. The Pros and Cons of…. Using this function is important especially when operating on multiple files simultaneously. More info here. Returns true if you are at the beginning of the file described by the file number. A BinaryReader object is created by passing a FileStream object to its constructor.

The following table shows some of the commonly used methods of the BinaryReader class. Reads a Boolean value from the current stream and advances the current position of the stream by one byte.

Reads the next byte from the current stream and advances the current position of the stream by one byte. Reads the specified number of bytes from the current stream into a byte array and advances the current position by that number of bytes.

Reads the next character from the current stream and advances the current position of the stream in accordance with the Encoding used and the specific character being read from the stream. Reads the specified number of characters from the current stream, returns the data in a character array, and advances the current position in accordance with the Encoding used and the specific character being read from the stream. Reads an 8-byte floating point value from the current stream and advances the current position of the stream by eight bytes.

Reads a 4-byte signed integer from the current stream and advances the current position of the stream by four bytes. Reads a string from the current stream. The string is prefixed with the length, encoded as an integer seven bits at a time. The BinaryWriter class is used to write binary data to a stream. This browser is no longer supported.

Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback? The first sample program uses the Get statement to process the file in "chunks", and second uses the Get statement to process the file all at once, and third uses the Input function to process the file all at once.

The job of the sample programs is to read in an HTML file, strip out all tags i. The figure below shows excerpts of both the HTML input file and the plain text output file.

In the HTML excerpt on the left, the text that was extracted out i. Plain Text Output File excerpt. Working with Files. Working with Files — Part 1. Sequential File Processing. Statements and Functions. Processing a Comma-Delimited File. Basic provides the capability of processing three types of files:.

The next several topics address VB's sequential file. Binary and Random files will be covered in later. Open Prepares a file to be processed by the VB. Path Supplies the path of your application. FreeFile Supplies a file number that is not. Input Reads fields from a comma-delimited sequential. The first sample program uses the technique of reading and processing a binary file one "chunk" at a time in this case 10, bytes at a time using the Get statement.

Since the file size is a little over 60, bytes, you will see that it took seven passes to read through the file. The code listed below is heavily commented to aid in the understanding of how the program works. Dim strBackSlash As String.

Dim strBuffer As String. Dim blnTagPending As Boolean. Dim lngX As Long. Dim lngBytesRemaining As Long. Print "Opening files Kill strTextFileName. Print "Processing 'chunk' If there are less as. Select Case strCurrentChar. Case Else. If Not blnTagPending Then. End If.