Note: The function, method, object, or property described in this topic is disabled if the Microsoft Jet Expression Service is running in sandbox mode, which prevents the evaluation of potentially unsafe expressions. For more information on sandbox mode, search for "sandbox mode" in Help.
Returns an Integer containing the Boolean value True when the end of a file opened for Random or sequential Input has been reached.
EOF( filenumber )
The required filenumberargument is an Integer containing any valid file number.
Use EOF to avoid the error generated by attempting to get input past the end of a file.
The EOF function returns False until the end of the file has been reached. With files opened for Random or Binary access, EOF returns False until the last executed Get statement is unable to read an entire record.
With files opened for Binary access, an attempt to read through the file using the Input function until EOF returns True generates an error. Use the LOF and Loc functions instead of EOF when reading binary files with Input, or use Get when using the EOF function. With files opened for Output, EOF always returns True.
Note: Examples that follow demonstrate the use of this function in a Visual Basic for Applications (VBA) module. For more information about working with VBA, select Developer Reference in the drop-down list next to Search and enter one or more terms in the search box.
This example uses the EOF function to detect the end of a file. This example assumes that MYFILE is a text file with a few lines of text.
' Open file for input.
Open "MYFILE" For Input As #1
' Check for end of file.
Do While Not EOF(1)
' Read line of data.
Line Input #1, InputData
' Print to the Immediate window.
' Close file.