Open filename for Append [Encoding encoding_type] [Lock lock_type] as [#]filenum

filename
encoding_type
lock_type
filenum

A file mode used with Open to open a text file for writing.

This mode is used to add text to an existing file with Print #, or comma separated values with Write#.

Text files can't be simultaneously read and written in FreeBASIC, so if both functions are required on the same file, it must be opened twice.

filename must be a string expression resulting in a legal file name in the target OS, without wildcards. The file will be sought for in the present directory, unless the filename contains a path . If the file does not exist, it is created. The pointer is set after the last character of the file.

Encoding_type indicates the Unicode Encoding of the file, so characters are correctly read. If omitted, "ascii" encoding is defaulted. Only little endian character encodings are supported at the moment.

• "utf8"
  
• "utf16"
  
• "utf32"
  
• "ascii" (the default)
  
  

Lock_type indicates the way the file is locked for other processes, it is one of:

• Read - the file can be opened simultaneously by other processes, but not for reading
  
• Write - the file can be opened simultaneously by other processes, but not for writing
  
• Read Write - the file cannot be opened simultaneously by other processes (the default)
  
  

filenum Is a valid FreeBASIC file number (in the range 1..255) not being used for any other file presently open. The file number identifies the file for the rest of file operations. A free file number can be found using the FreeFile function.

Dim i As Integer
For i = 1 To 10
    Open "test.txt" For Append As #1
    Print #1, "extending test.txt"
    Close #1
Next

• None
  
  

• Input (File Mode)
  
• Open
  
• Output
  
• Print #
  
• Write #