Command group Flag affected Reversible Execute on client Platform(s)
External commands YES NO NO All


WriteBinFile (pathnamebinfld [, start [, length]] ) Returns return-value


Note: The flag is set according to whether Omnis was able to make a call to this external command.

WriteBinFile writes binary data to the file system or data fork (not the resource fork).

Note for macOS Users: ReadBinFile and WriteBinFile are useful for reading and writing documents but not system and application files.

Pathname is a character field containing the full path of the file to which to write. If the output file does not already exist, WriteBinFile creates it.

Binfld is a binary field from which to write the data.

Start is an integer field specifying the byte position in the file where writing should begin. If the parameter is not used, the command defaults to 0 (zero), that is, the beginning of the file. To append data to an existing file, set Start to -1 (minus one).

Length is an integer field containing the number of bytes to write. If the parameter is not used, the value defaults to the length of the Binary field.

Return-value is an integer field that is the number of bytes written if no error code is returned. Otherwise, it is an error code, one of:

-1: End of file

-2: Out of memory

-10: File not found

-11: Bad file name

-12: Volume not found

-20: IO error

-100: Incorrect number of parameters

-101: Bad parameter value

-998: File too large


; write the binary class data of the window class 'MyWindow' to a file named 'binfile' in the root of the omnis tree sys(115) returns the full path to the Omnis executable
Calculate lPathname as con(sys(115),'binfile')
Calculate lBinfld as $clib.$windows.MyWindow.$classdata
WriteBinFile (lPathname,lBinfld) Returns lNumbytes
OK message {[lNumbytes] bytes written}