Returns a Long representing the size, in bytes, of a file opened using the FileOpen function.
The My feature gives you greater productivity and performance in file I/O operations than LOF. For more information, see My.Computer.FileSystem Object.
FileNumber does not exist.
File mode is invalid.
See the "Error number" column if you are upgrading Visual Basic 6.0 applications that use unstructured error handling. (You can compare the error number against the Number Property (Err Object).) However, when possible, you should consider replacing such error control with Structured Exception Handling Overview for Visual Basic.
This example uses the LOF function to determine the size of an open file. This example assumes that TestFile is a text file containing sample data.
Assembly: Visual Basic Runtime Library (in Microsoft.VisualBasic.dll)