Styjun

first I'm new in this, and I have this code that shows a prompt to restart or postpone the restart for a while, the issue is that i want to hide the message and bring it back after the time specified by the user.

I'm using a "visual basic form" and the time that restart will be postponed it's selected from a "ComboBox"

My code is as follows.

Imports System.Management
Imports System.Security.Permissions
Imports System
Imports System.IO
Imports System.Collections
Imports System.SerializableAttribute

Public Class Form2

 Dim PostponeReboot As Integer = 50

 Private Const CP_NOCLOSE_BUTTON As Integer = &H200
 Protected Overloads Overrides ReadOnly Property CreateParams() As CreateParams
 Get
 Dim myCp As CreateParams = MyBase.CreateParams
 myCp.ClassStyle = myCp.ClassStyle Or CP_NOCLOSE_BUTTON
 Return myCp
 End Get
 End Property

 Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
 Form1.Hide()
 Label4.Text = SystemInformation.UserName
 Button1.Enabled = False
 ComboBox1.Enabled = False
 Timer1.Interval = 1000
 End Sub

 Private Sub CheckBox1_CheckedChanged(sender As Object, e As EventArgs) Handles CheckBox1.CheckedChanged

 If CheckBox1.Checked Then
 CheckBox2.Enabled = False
 Button1.Enabled = True
 ComboBox1.Enabled = False
 ElseIf CheckBox1.Checked = 0 Then
 CheckBox2.Enabled = True
 Button1.Enabled = False
 ComboBox1.Enabled = False
 End If

 End Sub

 Private Sub CheckBox2_CheckedChanged(sender As Object, e As EventArgs) Handles CheckBox2.CheckedChanged
 If CheckBox2.Checked Then
 CheckBox1.Enabled = False
 ComboBox1.Enabled = True
 Button1.Enabled = True
 ElseIf CheckBox2.Checked = 0 Then
 CheckBox1.Enabled = True
 ComboBox1.Enabled = False
 Button1.Enabled = False
 End If
 End Sub

 Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
 If ComboBox1.Text = "1 Hora" Then
 PostponeReboot = 10
 ElseIf ComboBox1.Text = "2 Horas" Then
 PostponeReboot = 20
 ElseIf ComboBox1.Text = "4 Horas" Then
 PostponeReboot = 40
 ElseIf ComboBox1.Text = "Seleccione" Then
 Button1.Enabled = False
 End If
 End Sub

 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
 If CheckBox1.Checked Then
 MessageBox.Show("Rebooting")
 'Shell("shutdown -r -f -t 60")
 Form1.Close()
 End
 ElseIf CheckBox2.Checked Then
 MessageBox.Show(PostponeReboot)
 Timer1.Start()
 Me.Hide()
 End If

 If PostponeReboot = 0 Then
 Me.Show()
 Else
 Me.Hide()
 End If

 End Sub


 Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
 PostponeReboot = PostponeReboot - 1
 'Label5.Text = PostponeReboot
 End Sub

End Class

In the first "If" sentence of below I want to start the timer and hide the form, and in the second "If" i want to bring it back the form, but the form remains hidden.

 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
 If CheckBox1.Checked Then
 MessageBox.Show("Rebooting")
 'Shell("shutdown -r -f -t 60")
 Form1.Close()
 End
 ElseIf CheckBox2.Checked Then
 MessageBox.Show(PostponeReboot)
 Timer1.Start()
 Me.Hide()
 End If

 If PostponeReboot = 0 Then
 Me.Show()
 Else
 Me.Hide()
 End If

 End Sub

I've tried putting the second "If" sentence in another place but don't work, what I'm doing wrong.

I assume here that your Timer1 class raises the Timer1.Tick event every x time after Timer1.Start() is called. The fact that the form can hide tells me Timer1.Start() isn't a blocking method. As such, your second if statement will be verified right after you hide the form, without waiting for the PostponeReboot variable to reach zero. This particular button handler would then exit and your form would remain hidden. What I see is that you already have an event handler for each tick of your timer. Why not use this handler to verify the state of your PostponeReboot variable?

Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
 PostponeReboot = PostponeReboot - 1

 If PostponeReboot = 0 Then
 Timer1.Stop() 'I would assume
 Me.Show()
 End If
End Sub

Although, I would recommend you to try other solutions, like having your timer raise an event only when it reaches the elapsed time (so you don't have to handle each ticks unnecessarily). I would also recommend looking into an Universal Windows App with Toast Notifications as you could set a Notification to appear at a set time (handled by Windows) so that you don't have to have a thread running in the background for this.