param([string]$inParam)
$Username = 'SERVERdomain_user'
$Password = 'password'
$pass = ConvertTo-SecureString -AsPlainText $Password -Force
$Cred = New-Object System.Management.Automation.PSCredential -ArgumentList $Username,$pass
Invoke-Command -ComputerName SERVER_TEST -Authentication Default -ScriptBlock {&"D:Programsmyapplication.cmd" $inParam} -Credential $Cred

using (PowerShell powershellInstance = PowerShell.Create())
{
powershellInstance.AddScript();
}