TImageEnMIO.LoadFromBuffer

procedure LoadFromBuffer(Buffer: pointer; BufferSize: integer; Format: TIOFileType = ioUnknown);

Load an image or a multi-page image from the specified buffer.

Parameter	Description
Buffer	The buffer pointer
BufferSize	The buffer length in bytes
Format	Specifies the expected file format. If Format is ioUnknown, then try to find the format automatically

ImageEnMView1.MIO.LoadFromBuffer(mybuffer, mybufferlength, ioJPEG);