FullScreen

# settings, 0 = use default
[string] $targetimagename = "client.exe"
[int] $targetwidth = 0
[int] $targetheight = 0
[int] $targetdisplay = 0
[int] $borderfix = 0

# load System.Windows
$void = [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")

# import c#
Add-Type -Language CSharpVersion3 @"
using System;
using System.Runtime.InteropServices;

public class WindowUtil
{
    [StructLayout(LayoutKind.Sequential)]
    public struct RECT
    {
        public int Left;
        public int Top;
        public int Right;
        public int Bottom;
    }

    [DllImport("user32.dll")]
    public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

    [DllImport("user32.dll")]
    public static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);

    [DllImport("user32.dll")]
    public static extern bool GetClientRect(IntPtr hWnd, out RECT lpRect);

    [DllImport("user32.dll")]
    public static extern bool SetWindowPos(IntPtr hWnd,
        int hWndInsertAfter, int X,int Y, int cx, int cy, uint uFlags);

    public static void MaximizeWindow(IntPtr hWnd, int w, int h, int fix)
    {
        RECT inner, outer;

        ShowWindow(hWnd, 1 /* restore and activate */);
        GetClientRect(hWnd, out inner);
        GetWindowRect(hWnd, out outer);

        int border = (outer.Right - outer.Left) - (inner.Right - inner.Left);
        int titlebar = (outer.Bottom - outer.Top) - (inner.Bottom - inner.Top) - border;
        border = border / 2 - fix;

        SetWindowPos(hWnd, 1/*HWND_TOPMOST*/,
           -border, -border - titlebar, w + border * 2, h + titlebar + border * 2,
           0x0400/*SWP_NOSENDCHANGING*/);
    }
}
"@

# set screen size
Function GetScreenSize
{
    $screens = [System.Windows.Forms.Screen]::AllScreens
    if (($targetdisplay -le 0) -or ($targetdisplay -gt $screens.Count)) {
        $screen = $screens[0]
    } else {
        $screen = $screens[$targetdisplay - 1];
    }
    #"Screen Resolution: {0}x{1}" -f $screen.Bounds.Width, $screen.Bounds.Height
    if ($targetwidth -eq 0)  {
        $global:targetwidth = $screen.Bounds.Width
    }
    if ($targetheight -eq 0) {
        $global:targetheight = $screen.Bounds.Height
    }
}

GetScreenSize
[int] $found = 0
get-process | foreach-object -process   {
    if ($_.MainModule.ModuleName -eq $targetimagename)  {
        [WindowUtil]::MaximizeWindow($_.MainWindowHandle, $targetwidth, $targetheight, $borderfix)
        $found++
    }
}
"Found {0} matches" -f $found