IBM Lotus Symphony


Eof Function [Runtime]

Determines if the file pointer has reached the end of a file.

Syntax:

Eof (intexpression As Integer)

Return value:

Bool

Parameters:

Intexpression: Any integer expression that evaluates to the number of an open file.

Use EOF to avoid errors when you attempt to get input past the end of a file. When you use the Input or Get statement to read from a file, the file pointer is advanced by the number of bytes read. When the end of a file is reached, EOF returns the value "True" (-1).

Error Codes

5 Invalid procedure call

52 Bad file name or number

Example:

Sub ExampleWorkWithAFile

Dim iNumber As Integer

Dim sLine As String

Dim aFile As String

Dim sMsg as String

aFile = "c:\data.txt"

iNumber = Freefile

Open aFile For Output As #iNumber

Print #iNumber, "First line of text"

Print #iNumber, "Another line of text"

Close #iNumber

iNumber = Freefile

Open aFile For Input As iNumber

While not eof(iNumber)

Line Input #iNumber, sLine

If sLine <>"" then

sMsg = sMsg & sLine & chr(13)

end if

wend

Close #iNumber

Msgbox sMsg

End Sub


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