Show popup message with auto close and on top of all of the windows

Question

I need to create a function that shows a message to the user and if the user doesn't respond then it automatically closes the windows.

   function ShowMsg ($timeout,$message)
{
Add-Type -AssemblyName system.windows.forms
Add-Type -AssemblyName system.drawing

$form = New-Object System.Windows.Forms.Form
$form.Text = "Company Name"
$form.Size = New-Object System.Drawing.Size(300,200)
$form.StartPosition = 'CenterScreen'

$label = New-Object System.Windows.Forms.label
$label.Text = $message
$label.Size = New-Object System.Drawing.Size(200,40)
$form.Controls.Add($label)

#add button to form
$okButton = New-Object System.Windows.Forms.Button
$okButton.Location = New-Object System.Drawing.Point(75,120)
$okButton.Size = New-Object System.Drawing.Size(75,23)
$okButton.Text = 'OK'
$okButton.DialogResult = [System.Windows.Forms.DialogResult]::OK
$form.AcceptButton = $okButton
$form.Controls.Add($okButton)

$timer = New-Object System.Windows.Forms.Timer
$timer.Interval = $timeout * 1000
$timer.add_tick({$form.Close()})
$timer.Start()

$form.Topmost = $true
$form.ShowDialog()

$form.Dispose()
}

$timeout = 30

ShowMsg -message “This is the message you will see on the window`nMessage on new line” -timeout $timeout
$r = ShowMsg -message “This is the message you will see on the window`nMessage on new line” -timeout $timeout
if ($r -eq [System.Windows.Forms.DialogResult]::OK)
{
    Write-Host “Press ok now”
}else{
    Write-Host "$r"
}

I try to use the above code but after showing the message 3 or 4 times it starts closing the popup and in the output, I see "cancel"

enter image description here

Answer 1

The problem is with the timer.

In the form declaration, where you create the timer object, initially set it to $timer.Enabled = $false.

Next, add a $form.Add_Shown({$timer.Enabled = $true; $timer.Start()}) event handler to start the timer when the form is first shown.

In the Tick event of the timer, tell it to Stop() and close the form. Don't forget to dispose of the timer aswell:

Try

function ShowMsg ([int]$timeout, [string]$message){
    Add-Type -AssemblyName system.windows.forms
    Add-Type -AssemblyName system.drawing

    $form = New-Object System.Windows.Forms.Form
    $form.Text = "Company Name"
    $form.Size = New-Object System.Drawing.Size(300,200)
    $form.StartPosition = 'CenterScreen'
    $form.Topmost = $true

    $label = New-Object System.Windows.Forms.label
    $label.Text = $message
    $label.Location = New-Object System.Drawing.Point(10,10)
    $label.Size = New-Object System.Drawing.Size(200,40)
    $form.Controls.Add($label)

    #add button to form
    $okButton = New-Object System.Windows.Forms.Button
    $okButton.Location = New-Object System.Drawing.Point(75,120)
    $okButton.Size = New-Object System.Drawing.Size(75,23)
    $okButton.Text = 'OK'
    $okButton.DialogResult = [System.Windows.Forms.DialogResult]::OK
    $form.Controls.Add($okButton)
    $form.AcceptButton = $okButton

    $timer = New-Object System.Windows.Forms.Timer
    $timer.Enabled = $false           # disabled at first
    $timer.Interval = $timeout * 1000
    $timer.Add_Tick({ $timer.Stop(); $form.Close() })

    # start the timer as soon as the form is shown
    $form.Add_Shown({$timer.Enabled = $true; $timer.Start()})

    $form.ShowDialog()

    # clean-up
    $timer.Dispose()
    $form.Dispose()
}