creating textbox using commands

[elias97pro]

i've got this code to create a textbox using a command button but i can't understand anything of it , please can you explain what each word especially(set,prevtextcontrol,controlid) mean and what each line mean, here is the code :

Private Sub Command1_Click()
    Dim TextControl As TextBox
    Dim PrevTextControl As TextBox
    ControlID = ControlID + 1
    Set TextControl = Form1.Controls.Add("Vb.TextBox", "Text" & ControlID)
    If (ControlID > 1) Then
        Set PrevTextControl = Form1.Controls("Text" & (ControlID - 1))
    Else
        Set PrevTextControl = TextControl
    End If
    With TextControl
        .Left = (PrevTextControl.Left + PrevTextControl.Width) + 10
        .Top = 20
        .Width = 50
        .Height = 20
        .Visible = True
    End With
End Sub

[Honduras2811]

Each object on a form has a ControlID for use by the system. When you create a new object you have to create a new ControlID for it. Textboxes also need to know the ControlID of the previous Textbox, probably because of the Validation option.

The line that starts with set instantiates the new Textbox.
Everything after the line that starts with 'With' just sets the position of the new Textbox.
All the If End If structure is doing is getting the ControlID of the previous Textbox if there is one.