TIEMultiBitmap.GetImageToStream

procedure GetImageToStream(idx: Integer; Stream: TStream; ImageFormat: TIOFileType; IOParams: TIOParams = nil);

Saves the image at index, idx, to a stream.

Parameter	Description
idx	The image index (Where 0 is the first image)
Stream	The destination stream
ImageFormat	The output file format (e.g. ioTiff or ioJpeg)
Params	The save parameters

// Save the first image to a stream in JPEG format
MBitmap.GetImageToFile(0, MyStream, ioJPEG);