[Overview][Constants][Types][Classes][Procedures and functions][Variables] | Reference for unit 'Classes' (#fcl)

# TStream.WriteBuffer

Writes data from the stream to the buffer

## Declaration

`public procedure TStream.WriteBuffer(`
`const Buffer;`
`Count: LongInt`
`);`

## Description

WriteBuffer writes Count bytes to the stream from Buffer. If the stream does not allow Count bytes to be written, then an exception is raised.

WriteBuffer should be used to read in a fixed number of bytes, such as when writing structures or the content of variables. If the number of bytes is not determined, use TStream.Write instead. WriteBuffer uses Write internally to do the actual reading.

## Errors

If the stream does not allow to write Count bytes, then an exception is raised.

## See also

TStream.Write |  | Writes data from the stream to the buffer and returns the number of bytes written.
TStream.ReadBuffer |  | Reads data from the stream to a buffer