How to use dwmapi to update touch proofing data in Windows10 or later versions？

Asked Mar 13 '23 at 06:26

Active Mar 13 '23 at 06:26

Viewed 89 times

In the tablet settings, I can configure the display corresponding to the touch screen. Then I find MultiDigiMon.exe changed the registry in

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Wisp\Pen\Digimon

and MultiDigiMon.exe use dwmapi.Dll to update the setting.

Now I don't want to used MultiDigiMon.exe , I chenaged registry by myself. But I don't know how to update the setting by API, I only can taskkill dwm.exe, and the dwm.exe will auto restart and it work well with new setting .

But kill dwm.exe it not a good idea. How to update this setting silently?

This is MSDN. https://learn.microsoft.com/en-us/windows/win32/dwm/functions?redirectedfrom=MSDN

And I used DwmFlush function API , but did not take effect and always return False.

asked Mar 13 '23 at 06:26

gw5188

I can't test it but can you try to call `SendMessageTimeoutW(HWND_BROADCAST, WM_SETTINGCHANGE, NULL, (LPARAM)L"TabletPCDigitizerMappingChanged", 0, 200, NULL);` to force update (from disasm https://i.imgur.com/Ny8Uwe9.png) – Simon Mourier Mar 13 '23 at 08:19
SendMessageTimeoutW only used by windows 7 – gw5188 Mar 14 '23 at 06:03
"SendMessageTimeoutW only used by windows " what do you mean by that have you tried it? – Simon Mourier Mar 14 '23 at 06:32
In Windows 8 or later ，this way is not useful . – gw5188 Mar 14 '23 at 06:34
Please explain what you say – Simon Mourier Mar 14 '23 at 06:38
https://i.imgur.com/tXtTPKD.png After Win8 is implemented by SetDisplayMapping on line 96 in the picture – gw5188 Mar 14 '23 at 06:54
I still don't understand what you mean. Have you tried what I said, yes or no? – Simon Mourier Mar 14 '23 at 06:59
https://i.imgur.com/6hlWmOy.png Yes – gw5188 Mar 14 '23 at 07:15

How to use dwmapi to update touch proofing data in Windows10 or later versions？

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