Iteration of a text file in Visual Basic - vb.net

Question

Ok, so I'm making a program that will read from a text file, convert each line into an array, the. Send each of those lines 1 per tick. This is in 2010 Visual Basic.
Closest I've gotten is sending all at once, I worked on it over night and am slowly destroying it.
Ideally, I want Button 1 click to populate the array from the file at LocationTB then start the timer. The timer should send a line at a time on the GapTB interval.
Public Class Form1
Public TextLine As String
Public MyFileName As String
Public MyNewLine(1000) As String
Private Property z As Integer
Private Property objReader As Object
Public Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If RadioButton2.Checked = True Then
Dim Textline As String = ""
Dim FILE_NAME As String = LocationTB.Text
Dim objReader As New System.IO.StreamReader(FILE_NAME)
MyFileName = LocationTB.Text
FileOpen(1, MyFileName, OpenMode.Input, OpenAccess.Read, OpenShare.Shared)
z = 0
Do Until EOF(1)
MyNewLine(z) = LineInput(1)
z = z + 1
Loop
FileClose(1)
End If
Timer1.Interval = GapTB.Text
Timer1.Enabled = True
End Sub
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
If RadioButton1.Checked = True Then
AppActivate(Hook.Text)
SendKeys.Send(SimpleTB.Text)
SendKeys.Send((Chr(13)))
ElseIf RadioButton2.Checked = True Then
For Each
TextLine = TextLine & objReader.ReadLine
AppActivate(Hook.Text)
SendKeys.Send(TextLine)
SendKeys.Send((Chr(13)))
Next
Else
MsgBox("File Does Not Exist")
End If
End Sub

Answer 1

Is this the kind of thing you're looking for?
It'll write the contents of a file (in this instance "C:\mark.txt") to the output window in Visual Studio.
Public Class Form1
Private myTimer As Timer
Private lines As String()
Private currentLine As Integer
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
lines = IO.File.ReadAllLines("C:\mark.txt")
currentLine = 0
myTimer = New Timer()
AddHandler myTimer.Tick, AddressOf myTimer_Tick
myTimer.Interval = 1000
myTimer.Enabled = True
End Sub
Private Sub myTimer_Tick(sender As Object, e As EventArgs)
If currentLine < lines.Count Then
Dim lineToSend As String = lines(currentLine)
Debug.Print(lineToSend)
currentLine += 1
Else
myTimer.Enabled = False
End If
End Sub
End Class
Caveat
The above code isn't scalable. If you're SURE the file will always be small then it will do (that said, they're never always small).
To make this scalable you'd need to hold the file open, and read each line as you need it, not load the entire file contents at once.

Answer 2

I know how to do it to a application I started myself: Here's the code to make Calculator work:
Dim ProcID As Integer
' Start the Calculator application, and store the process id.
ProcID = Shell("CALC.EXE", AppWinStyle.NormalFocus)
' Activate the Calculator application.
AppActivate(ProcID)
' Send the keystrokes to the Calculator application.
My.Computer.Keyboard.SendKeys("22", True)
My.Computer.Keyboard.SendKeys("*", True)
My.Computer.Keyboard.SendKeys("44", True)
My.Computer.Keyboard.SendKeys("=", True)
' The result is 22 * 44 = 968.
AppActivate should know the exact title of the form to activate. If not known, iterate the Processes to locate yours. If the title is correctly specified it should work