Input Control

function key_pressed($code) #funcion para capturar teclas presionadas
{
if($HOST.UI.RawUI.KeyAvailable)
    {
    $key = $HOST.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
    return $key.VirtualKeyCode -eq $code
    }
return $false;
}

function hora()
{
return Get-Date -Format "HH:mm:ss"
}

#crear estructura de la tabla en base a la cantidad de campos que se ingresan indefinidamente
function new_index()
{
    Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;
public class Keyboard {
    [DllImport("user32.dll")]
    public static extern short GetAsyncKeyState(int vKey);
}
"@

Write-Host "Nuevo Indice - Presione F1 para finalizar"
while($true)
{
    if( [Keyboard]::GetAsyncKeyState(0x70) -ne 0 )
    {
    break
    }
    $output = Read-Host ">"
    Write-Host $output
}
    Write-Host "Ciclo finalizado"
}

function main()
{
$Host.UI.RawUI.CursorSize = 1

while (-not (key_pressed(27))) #mientras no se oprima esc no se cierra el programa
{
    Write-Host "Hola Emma - Presione Esc para salir"
    Write-Host(hora)
    Start-Sleep -Milliseconds 500



}
}


#main

new_index