Get-ScreenCapture.ps1

function Get-ScreenCapture
{
<#
.SYNOPSIS
There are prettier ways to run screencaps, but this is fast and for audit controls <shrug>

.NOTES

#### Name:       Get-ScreenCapture
#### Author:     J Schell
#### Version:    0.1.0
#### License:    MIT

### Change Log

##### 2019-04-18::0.1.0
- initial create

#>


    [CmdletBinding()]
    Param
    (
        $ProcessID = $PID,
        $Path = $pwd
    )
    Begin
    {
        $src = @'
            using System;
            using System.Runtime.InteropServices;

            namespace PInvoke
            {
                public static class NativeMethods 
                {
                    [DllImport("user32.dll")]
                    [return: MarshalAs(UnmanagedType.Bool)]
                    public static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);
                }

                [StructLayout(LayoutKind.Sequential)]
                public struct RECT
                {
                    public int Left;        // x position of upper-left corner
                    public int Top;         // y position of upper-left corner
                    public int Right;       // x position of lower-right corner
                    public int Bottom;      // y position of lower-right corner
                }
            }
'@
        Add-Type -TypeDefinition $src
        Add-Type -AssemblyName System.Drawing

        
    }
    Process
    {
        $targetProcess = Get-Process -id $ProcessID
        $bmpScreenCap = $null
        $graphics = $null
        try 
        {
            $rect = new-object PInvoke.RECT
            if ([PInvoke.NativeMethods]::GetWindowRect($targetProcess.MainWindowHandle, [ref]$rect))
            {
                $width = $rect.Right - $rect.Left + 1
                $height = $rect.Bottom - $rect.Top + 1
                $bmpScreenCap = new-object System.Drawing.Bitmap $width,$height
                $graphics = [System.Drawing.Graphics]::FromImage($bmpScreenCap)
                $graphics.CopyFromScreen($rect.Left, $rect.Top, 0, 0, $bmpScreenCap.Size, 
                                  [System.Drawing.CopyPixelOperation]::SourceCopy)
                $shortDateString = (Get-Date).toString('s').Replace(':','.')
                $bmpScreenCap.Save("$Path\$($shortDateString)-screencap.bmp")
            }
        }
        finally 
        {
            if ($bmpScreenCap) { $bmpScreenCap.Dispose() }
            if ($graphics) { $graphics.Dispose() }
        }
    }
    End
    {   
    }
}