|
<< Click to Display Table of Contents >> Navigation: File functions and statements > Open |
Description
Enables input/output (I/O) to a file.
Syntax
Open pathname For mode As [#]filenumber [Len=reclength]
The Open statement syntax has these parts:
Part |
Type |
Description |
Pathname |
String |
Required. String expression that specifies a file name - may include directory or folder, and drive. |
Mode |
Required. Keyword specifying the file mode: Append, Binary, Input, Output, or Random. If unspecified, the file is opened for Random access. |
|
Filenumber |
Integer |
Required. A valid file number in the range 1 to10, inclusive. Use the FreeFile function to obtain the next available file number. |
Reclength |
Integer |
Optional. Number less than or equal to 32,767 (bytes). For files opened for random access, this value is the record length. For sequential files, this value is the number of characters buffered. |
Remarks
You must open a file before any I/O operation can be performed on it. Open allocates a buffer for I/O to the file and determines the mode of access to use with the buffer.