vb.net close winforms application from title bar X button - vb.net

Question

Using VB.Net on a winforms application I have two forms
Both forms are set to "When Last Form Closes"
Both forms have "Key Preview" set to TRUE
frmOne the start up form has a "Form Border Style" set to FixedToolWindow
Here are the sequence of events preformed with the two forms
Load frmOne and click the X button on the title bar form closes and the start button shows up in the IDEThis is the desired behavior
Second sequence of events load app frmOne has a button to navigate to frmTwo and frmTwo has a button to navigate back to frmOne When we arrive back at frmOne we click the X button on the title bar and frmOne close but the app is still running NO Start button in the IDE
The Question is how to close the application after navigating to other forms?
The Code Below are the various ways I have tried to solve this issue
I am including the KeyPress Code which does not exhibit the desired results
Private Sub frmOne_KeyPress(sender As Object, e As KeyPressEventArgs) Handles Me.KeyPress
'frmOne Property KeyPreview needs to be set to True
If Asc(e.KeyChar) = 27 Then
'MessageBox.Show("You Pressed " & e.KeyChar)
Me.Close()
End If
End Sub
'Public Sub frmOne_QueryClose(Cancel As Integer, CloseMode As Integer)
'Prevent user from closing with the Close box in the title bar.
'If CloseMode = 1 Then Me.Close()
'If CloseMode = 1 Then Application.Exit()
'End Sub
'Private Sub frmOne_FormClosing(sender As Object, e As FormClosingEventArgs) 'Handles Me.FormClosing
'Application.Exit()
'Me.Close()
'End Sub
Private Sub frmOne_FormClosed(sender As Object, e As FormClosedEventArgs) Handles Me.FormClosed
'Application.Exit()
End Sub
Code to frmTwo
Private Sub btnToFormTwo_Click(sender As Object, e As EventArgs) Handles btnToFormTwo.Click
Dim i As Integer
i = txtBoxOne.Text.Length
If i = 0 Then
MsgBox("Enter Data")
txtBoxOne.Select()
Return
End If
Dim OBJ As New frmTwo
OBJ.SPass = txtBoxOne.Text
OBJ.Show()
lblFormOne.Text = " "
txtBoxOne.Clear()
Me.Hide()
'Me.Close()'R Click project PassVar Set Start Up Form
'Best Solution is to have Splash Form as Start Up Form
End Sub
Code Back to frmOne
Private Sub btnBack_Click(sender As Object, e As EventArgs) Handles btnBack.Click
frmOne.txtBoxOne.Text = "Back from 2"
Me.Hide()
frmOne.Show()
End Sub

Answer 1

You need to close Forms to get the application to end. I use "When last form closes" in a project with maybe a dozen forms and it works fine.
Private Sub btnBack_Click(sender As Object, e As EventArgs) Handles btnBack.Click
frmOne.txtBoxOne.Text = "Back from 2"
'Me.Hide() 'frmTwo is still running, To close a form use .Close()
Close()
frmOne.Show()
End Sub

Answer 2

You had your vb project set to quit "when last form closes" - opening a second form from your startup form meant that when you closed the startup form, there was still another form open so the app did not quit. Changing the setting to "when startup form closes" made the app behave as you expected