How to send text/string when key is pressed powershell - powershell

Question

I want to make macros using function keys to improve my workflow but the code below doesnt work, i think its quite self explanatory, while the code is running if i press X key, a different text is sent.
$wshell = New-Object -ComObject wscript.shell;
# choose the key you are after
$key = [System.Windows.Input.Key]::LeftCtrl
$isCtrl = [System.Windows.Input.Keyboard]::IsKeyDown($key)
while ($true)
{
if ($isCtrl)
{
$wshell.SendKeys('Thank you for using the service.')
}
}
The code above doesnt work. But if i only use the code below it does send the string as expected.
$wshell = New-Object -ComObject wscript.shell;
sleep 1
$wshell.SendKeys('Digital service desk')

Answer 1

You keep checking the same value inside the loop since $isCtrl is never assigned to after entering the loop.
Change to:
while ($true)
{
$isCtrl = [System.Windows.Input.Keyboard]::IsKeyDown($key)
if ($isCtrl)
{
$wshell.SendKeys('Thank you for using the service.')
}
}
So that you re-check whether control is pushed down every time.

Answer 2

As stated by Mathias R. Jessen i was not updating the value of $isCtrl inside the loop. I'll now post the code if anyone wants to use it.
$wshell = New-Object -ComObject wscript.shell;
Add-Type -AssemblyName WindowsBase
Add-Type -AssemblyName PresentationCore
while ($true)
{
if ([System.Windows.Input.Keyboard]::IsKeyDown([System.Windows.Input.Key]::F2))
{
sleep 1
$wshell.SendKeys('Message after pressing F2')
} elseif ([System.Windows.Input.Keyboard]::IsKeyDown([System.Windows.Input.Key]::F4)){
sleep 1
$wshell.SendKeys('Message after pressing F4')
}
}