R – How to dynamically display one of two Winforms tabs

This will return the parent folder name:

Public Function GetParentFolderName(ByVal path As String) As String
    Dim result As String
    With fso = CreateObject("Scripting.FileSystemObject")
        result = .GetParentFolderName(path)
        GetParentFolderName = Mid(result, InStrRev(result, "\") + 1)
    End With
End Function

Usage:

Sub GetParentFolderNameTest()
    Debug.Print GetParentFolderName("C:\Windows\System32\notepad.exe")
End Sub

Output:

System32

private void HideTab(object sender, EventArgs e)
{
    this.tabControl1.TabPages.Remove(this.tabPage2);
}
private void ShowTab(object sender, EventArgs e)
{
    this.tabControl1.TabPages.Add(this.tabPage2);
}

this.tabPage2 is your 7th tabpage, whatever name you give it.