Определить разрядность исполняемых файлов

function Get-BinaryType {
  param(
    [Parameter(Mandatory=$true, ValueFromPipeline=$true)]
    [ValidateNotNullOrEmpty()]
    [ValidateScript({Test-Path $_})]
    [String]$Path
  )
 
  begin {
    ($$ = [PSObject].Assembly.GetType(
      'System.Management.Automation.NativeCommandProcessor'
    )).GetFields([Reflection.BindingFlags]40) |
    Where-Object {$_.Name -cmatch '\ASCS_'} |
    ForEach-Object {$bt = @{}}{
      $bt[$_.GetValue($null)] = $_.Name
    }
    
    $GetBinaryType = $$.GetMethod(
      'GetBinaryTypeA', [Reflection.BindingFlags]40
    )
 
    $Path = Convert-Path $Path
    [Int32]$bintype = 0
  }
  process {
    if (0 -eq $GetBinaryType.Invoke($null, (
      $par = [Object[]]@($Path, $bintype)
    ))) {
      throw ((New-Object ComponentModel.Win32Exception(
        [Runtime.InteropServices.Marshal]::GetLastWin32Error()
      )).Message -replace '%1', $Path)
    }
    $bt[$par[1]]
  }
  end {}
}

PS E:\sandbox> Get-BinaryType .\app.exe
SCS_64BIT_BINARY

function Get-Bitness( $FilePath )
{
    $result = "Unknown"
 
    [int32]$MACHINE_OFFSET = 4
    [int32]$PE_POINTER_OFFSET = 60
 
    if (Test-Path -LiteralPath $FilePath -PathType Leaf)
    {
        [byte[]]$data = New-Object -TypeName System.Byte[] -ArgumentList 4096
        $stream = New-Object -TypeName System.IO.FileStream -ArgumentList ($FilePath, 'Open', 'Read')
        $stream.Read($data, 0, 4096) | Out-Null
        $stream.Close()
 
        [int32]$PE_HEADER_ADDR = [System.BitConverter]::ToInt32($data, $PE_POINTER_OFFSET)
        [int32]$machineUint = [System.BitConverter]::ToUInt16($data, $PE_HEADER_ADDR + $MACHINE_OFFSET)
 
        switch ($machineUint)
        {
            0      { $result = 'Native' }
            0x014c { $result = 'x86' }
            0x0200 { $result = 'Itanium' }
            0x8664 { $result = 'x64' }
        }
    }
    return $result
}

function Get-Bitness($FilePath){$result="Unknown";[int32]$MACHINE_OFFSET=4;[int32]$PE_POINTER_OFFSET=60;if(Test-Path -LiteralPath $FilePath -PathType Leaf){[byte[]]$data=New-Object System.Byte[] 4096;$stream=New-Object System.IO.FileStream $FilePath,'Open','Read';$stream.Read($data,0,4096)|Out-Null;$stream.Close();[int32]$PE_HEADER_ADDR=[System.BitConverter]::ToInt32($data,$PE_POINTER_OFFSET);[int32]$machineUint=[System.BitConverter]::ToUInt16($data,$PE_HEADER_ADDR+$MACHINE_OFFSET);switch($machineUint){0{$result='Native'}0x014c{$result='x86'}0x0200{$result='Itanium'}0x8664{$result='x64'}}}return $result}