What is the usage of “open” in vb?

In VB, the Open statement is used to open a file or database connection, specifying the way it is opened. The syntax is as follows:

Open path For mode As #fileNumber

The path represents the file path or database connection string to open; the mode represents the type of opening, which can be Input, Output, Append, Binary, Random, etc.; the fileNumber is the file number or connection number used to reference the file or connection in subsequent file operations.

For example, to open a file in read mode and read its contents, you can use the following code:

Dim fileNumber As Integer
fileNumber = FreeFile

Open "C:\example.txt" For Input As #fileNumber
Do Until EOF(fileNumber)
    Line Input #fileNumber, textLine
    MsgBox textLine
Loop
Close #fileNumber