working with files and directories

Where can i find information about copying files, making directories, looking if a file exists?

Your MSDN Library holds all that information, but if you can't find it, I'll share it with you.

The FileCopy statement copies a files from a directory to another directory.

The MkDir statement creates a directory.

The Dir function checks to see whether a file exists or not.


This is how you use them.


FileCopy

VB Code:

FileCopy "C:\MyFile.exe", "C:\MyDir\MyFile.exe"

MkDir

VB Code:

MkDir "C:\MyDir"

Dir (combined with the Len function for speed)

VB Code:

If Len(Dir$("C:\MyFile.exe")) <> 0 Then
    Msgbox "File exists"
Else
    Msgbox "File does not exist"
End If

Also, it is best to use the Dir function to check if a folder exists before using the MkDir statement, because if a folder exists, your program will cause an error.

VB Code:

Private Function CheckDir(ByVal sDir As String) As Boolean
    CheckDir = CBool(Len(Dir$(sDir, vbDirectory)))
End Function
 
Private Sub Command1_Click()
    If CheckDir("C:\MyDir") Then
        MsgBox "Directory exists"
    Else
        MkDir "C:\MyDir"
    End If
End Sub

Keep in mind that you can also use the Name statement to rename and move files instead of using FileCopy and deleting the files using the Kill statement.


Rename

VB Code:

Name "C:\MyFile.exe" As "C:\YourFile.exe"

Move

VB Code:

Name "C:\MyFile.exe" As "C:\MyDir\MyFile.exe"

If you were to use the FileCopy statement, it would look like this, and would take up more code, probably a bit slower as well.

VB Code:

FileCopy "C:\MyFile.exe", "C:\MyDir\MyFile.exe"
Kill "C:\MyFile.exe" 'delete the old remaining file