Files

SPEL+ has several commands for handling files.

Keyword	Description
AOpen	Opens a file for append.
BOpen	Opens a file for binary access.
Close	Closes a file.
FileExists	Checks if a file exists.
FolderExists	Check if a folder exists.
FreeFile	Returns an unused file handle.
Input	Inputs one or more variables from a file
Del	Deletes a file.
Line Input	Inputs line from a file.
Read	Reads a specified number of bytes into a string variable.
ReadBin	Reads binary data.
ROpen	Open a file with the read only mode.
Seek	Sets the current file pointer.
Flush	Writes data buffer to disk.
WOpen	Open a file with the write mode.
Write	Write the string to the file. Line terminator is not added.
WriteBin	Writes binary data.

Before using a file you must open it with one of the following commands: AOpen, Bopen, ROpen, and WOpen. And specify a file number in the Open statement. File number can be 30 to 63.

Here is an example to save a text file and read it.

String data$(10)

Function SaveData()
  Integer fNum, i

  fNum = FreeFile
  WOpen "c:\mydata\data.txt" As #fNum  ' Store the count
  Print #fNum, UBound(data$)
  For i = 0 To UBound(data$)
    Print #fNum, data$(i)
  Next i
  Close #fNum
Fend

Function LoadData()
  Integer fNum, i, maxNum
  fNum = FreeFile
  ROpen "c:\mydata\data.txt" As #fNum
  Input #fNum, maxNum
  Redim data$(maxNum)
  For i = 0 To UBound(data$)
    Input #fNum, data$(i)
  Next i
  Close #fNum
Fend