Magnification API: MagGetInputTransform in Win10

[FTWRoman]

Hello there!  I've been looking at leveraging the WinMagnifier.au3 include to make a legacy app with a hard-coded screensize fit in quasi-fullscreen.  While it works for the most part using a keyboard/mouse, the application doesn't seem to play nice in Win10 using a touchscreen.

Microsoft introduced the MagGetInputTransform as part of the Redstone update; as such, when you touch a display at what would phyiscally be, say, (200,200), it will transcribe your touch to what (200,200) is displayed as un-magnified.  Without making this DLL call to adjust the resolution, the touch aspect is entirely off, no matter how you position the magnification/display.

I think the main challenge I'm having is that I can't figure out the LPRECT part of DllCall.  I'm at least able to get values to use if I call them as a pointer.

;~ The assumption here is that the 4:3 app is in the top-left corner of the screen
;~ As such, we know where the script will be magnifying, as well as the size of the normal display...

$pRectSource = DllStructCreate("int rect[4]")
DllStructSetData($pRectSource,1,0, 1)
DllStructSetData($pRectSource,1,0, 2)
DllStructSetData($pRectSource,1,$HorizontalResizeArea, 3)
DllStructSetData($pRectSource,1,$VerticalResizeArea, 4)
$pRectSourcePtrRECT = DllStructGetPtr($pRectSource)

$pRectDest = DllStructCreate("int rect[4]")
DllStructSetData($pRectDest,1,0, 1)
DllStructSetData($pRectDest,1,0, 2)
DllStructSetData($pRectDest,1,@DesktopWidth, 3)
DllStructSetData($pRectDest,1,@DesktopHeight, 4)
$pRectDestPtrRECT = DllStructGetPtr($pRectDest)

;~ These will return different values
MsgBox(0,"Test",$pRectSourcePtrRECT)
MsgBox(0,"Test",$pRectDestPtrRECT)

;~ ...

;~ Here's where I'm trying to make the DllCall, leading to the script exiting unexpectedly

Local $pfEnabled = True
$MagSet = DllCall($g_hMagnificationDLL, "BOOL", "MagGetInputTransform", "BOOL", $pfEnabled, "ptr", $pRectSourcePtrRECT, "ptr", $pRectDestPtrRECT)

I'm not having any luck using references to "RECT" (with/without asterisks, capitalization, or other major variations thereof), but referencing the LPRECT value as a pointer at least gives me a value in my MsgBox, so I'm assuming that is the correct approach.

Any idea what I'm doing wrong (aside from running a legacy app in 2020)?  Thanks in advance!

[FTWRoman]

Ah, I think I see a major problem:  I was testing with "MagGetInputTransform" and meant to use "MagSetInputTransform" instead. 🙄

Edited May 18, 2020 by Melba23
Quote removed

[Melba23]

FTWRoman,

Welcome to the AutoIt forum.

When you post in future, please use the "Reply to this topic" button at the top of the thread or the "Reply to this topic" editor at the bottom rather than the "Quote" button (unless it is really needed) - it just pads the thread unnecessarily. Thanks in advance for your cooperation.

M23

[mLipok]

16 hours ago, FTWRoman said:

I've been looking at leveraging the WinMagnifier.au3 include to make a legacy app with a hard-coded screensize fit in quasi-fullscreen.

Is this realeated to High DPI ?

[Danyfirex]

Hello.

pfEnabled is a pointer to a bool. So You dll call should be something like this:

Local $aCall = DllCall($hDll, "BOOL", "MagGetInputTransform", "BOOL*", 0, "ptr", DllStructGetPtr($tSRECT), "ptr", DllStructGetPtr($tDRECT))

Local $pfEnabled = $aCall[1]

 

Saludos