Opening up process and grabbing window title. Where did I go wrong? - vb.net

Question

In my application I allow for the users to add a program from a open file dialog, and it then adds the item to a listview and saves the items location into the tag. So what I am trying to do is when the program in the listview is selected and the button is pressed, it starts a timer and this timer checks to see if the process is running, and if it isn't launches the process, and once the process is launched it gets the window title of the process and sends it to a textbox on another form.
EDIT:
The question is if anyone can see why it is not working, by this I mean starting the process, then when it's started closing the form and adding the process window title to a textbox on another form.
I have tried to get it working but I can't. I know that the process name it is getting is right I think my problem is to do with my for loop. Basically it isn't doing anything visible right now.
I feel like I am very close with my code and im hoping it just needs a couple minor tweaks. Any help would be appreciated. Sorry if my coding practices aren't that great, im pretty new to this.
**EDIT:I found solution. I added code to the button that enables my timer to execute the process. Also another problem was indeed the way it read the file, I had to use the replace function to remove the ".exe" from the filepath code.
EDIT 2 : A better solution has been posted by Mark Hall. I am now using his code as it has less chance for error.
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim s As String = ListView1.SelectedItems(0).Tag
Dim myFile As String = Path.GetFileName(s)
Dim mu As String = myFile.Replace(".exe", "").Trim()
Dim f As Process
Dim p As Process() = Process.GetProcessesByName(mu)
For Each f In p
If p.Length > 0 Then
For i As Integer = 0 To p.Length - 1
ProcessID = (p(i).Id)
AutoMain.Name.Text = f.MainWindowTitle
Timer1.Enabled = False
Me.Close()
Next
Else
ProcessID = 0
End If
If ProcessID = 0 Then
Process.Start(mu)
End If
Next
End Sub

Answer 1

What is happening is that you are looking for a Process that matches your parameters before you enter your For Each loop the Process array is empty so it never enters it, therefore you never start your process.
This is a very quick example that works:
Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
Dim s As String = ListView1.SelectedItems(0).Tag.ToString
Dim myFile As String = Path.GetFileName(s)
Dim p As Process() = Process.GetProcessesByName(Path.ChangeExtension(myFile, Nothing))
Static started As Boolean
If p.Count > 0 Or started Then
If p.Length > 0 Then
For i As Integer = 0 To p.Length - 1
ProcessId = (p(0).Id)
AutoMain.Name.Text = p(0).MainWindowTitle
Timer1.Enabled = False
started = False
Timer1.Stop()
Me.Close()
Next
Else
ProcessId = 0
End If
Else
started = True
Process.Start(myFile)
End If
End Sub