Change Screen Resolution on two different monitors (or more)

[nitekram]

I have found the code to do this, but I am wondering how you would change to a second monitor.

Found the code here, but it might be located on different posts...

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;===============================================================================
;
; Function Name: _ChangeScreenRes()
; Description: Changes the current screen geometry, colour and refresh rate.
; Version: 1.0.0.1
; Parameter(s): $i_Width - Width of the desktop screen in pixels. (horizontal resolution)
; $i_Height - Height of the desktop screen in pixels. (vertical resolution)
; $i_BitsPP - Depth of the desktop screen in bits per pixel.
; $i_RefreshRate - Refresh rate of the desktop screen in hertz.
; Requirement(s): AutoIt Beta > 3.1
; Return Value(s): On Success - Screen is adjusted, @ERROR = 0
; On Failure - sets @ERROR = 1
; Forum(s): <a href='http://www.autoitscript.com/forum/index.php?showtopic=20121' class='bbc_url' title=''>http://www.autoitscript.com/forum/index.php?showtopic=20121</a>
; Author(s): Original code - psandu.ro
; Modifications - PartyPooper
;
;===============================================================================

Func _ChangeScreenRes($i_Width = @DesktopWidth, $i_Height = @DesktopHeight, $i_BitsPP = @DesktopDepth, $i_RefreshRate = @DesktopRefresh)
    Local Const $DM_PELSWIDTH = 0x00080000
    Local Const $DM_PELSHEIGHT = 0x00100000
    Local Const $DM_BITSPERPEL = 0x00040000
    Local Const $DM_DISPLAYFREQUENCY = 0x00400000
    Local Const $CDS_TEST = 0x00000002
    Local Const $CDS_UPDATEREGISTRY = 0x00000001
    Local Const $DISP_CHANGE_RESTART = 1
    Local Const $DISP_CHANGE_SUCCESSFUL = 0
    Local Const $HWND_BROADCAST = 0xffff
    Local Const $WM_DISPLAYCHANGE = 0x007E
    If $i_Width = "" Or $i_Width = -1 Then $i_Width = @DesktopWidth ; default to current setting
    If $i_Height = "" Or $i_Height = -1 Then $i_Height = @DesktopHeight ; default to current setting
    If $i_BitsPP = "" Or $i_BitsPP = -1 Then $i_BitsPP = @DesktopDepth ; default to current setting
    If $i_RefreshRate = "" Or $i_RefreshRate = -1 Then $i_RefreshRate = @DesktopRefresh ; default to current setting
    Local $DEVMODE = DllStructCreate("byte[32];int[10];byte[32];int[6]")
    Local $B = DllCall("user32.dll", "int", "EnumDisplaySettings", "ptr", 0, "long", 0, "ptr", DllStructGetPtr($DEVMODE))
    If @error Then
        $B = 0
        SetError(1)
        Return $B
    Else
        $B = $B[0]
    EndIf
    If $B <> 0 Then
        DllStructSetData($DEVMODE, 2, BitOR($DM_PELSWIDTH, $DM_PELSHEIGHT, $DM_BITSPERPEL, $DM_DISPLAYFREQUENCY), 5)
        DllStructSetData($DEVMODE, 4, $i_Width, 2)
        DllStructSetData($DEVMODE, 4, $i_Height, 3)
        DllStructSetData($DEVMODE, 4, $i_BitsPP, 1)
        DllStructSetData($DEVMODE, 4, $i_RefreshRate, 5)
        $B = DllCall("user32.dll", "int", "ChangeDisplaySettings", "ptr", DllStructGetPtr($DEVMODE), "int", $CDS_TEST)
        If @error Then
            $B = -1
        Else
            $B = $B[0]
        EndIf
        Select
            Case $B = $DISP_CHANGE_RESTART
                $DEVMODE = ""
                Return 2
            Case $B = $DISP_CHANGE_SUCCESSFUL
                DllCall("user32.dll", "int", "ChangeDisplaySettings", "ptr", DllStructGetPtr($DEVMODE), "int", $CDS_UPDATEREGISTRY)
                DllCall("user32.dll", "int", "SendMessage", "hwnd", $HWND_BROADCAST, "int", $WM_DISPLAYCHANGE, _
                        "int", $i_BitsPP, "int", $i_Height * 2 ^ 16 + $i_Width)
                $DEVMODE = ""
                Return 1
            Case Else
                $DEVMODE = ""
                SetError(1)
                Return $B
        EndSelect
    EndIf
EndFunc   ;==>_ChangeScreenRes

My issue is that I share this desktop with other people...everyone likes to have their own resolutions. I like 1280*1024, where is my coworker likes 1600*1200. I have a script that both of us run all day long, and was trying to change screen on the fly, once the script starts. The trouble: I want all monitors to be the same resolution. As it sits right now, I call this function with my resolution, and would hope it would change all, but only changes one monitor. How do I add to this function to change all or a single monitor to the size I want. Oh, why I say this, all our monitors are not the same, so potentially it could be one changed one way and another change another way.

Hope I am clear as mud...trying to automatically change display settings, based on user that is on the computer.

EDIT - i might have found it in the link i posted as that link is not the same code

Edited March 18, 2014 by nitekram

[nitekram]

Just found another issue. The code is changing my default monitor - meaning my right monitor is the primary and my left is secondary. After I change using the above code...it changes them, so that my right is my secondary and my left is primary - not good for my application.