Does anyone know how to change the resolution of the game? I go into options for video and sound but nothing appears on it. I do not know if it's problem resolution but the game gets a bit blurry here on my computer, not to read things right.
Can anyone help me please?

Unfortunately these games don't have resolution options; there is a mod for MM7 (MMResTool027fix2.zip) which lets that game run at any specified resolution, but there is nothing like that for the other games.

Which game are you referring to? If it's one of the dosbox games, you might be able to make it look less blurry by changing the scaler option in Dosbox configuration file.

I am referring to might and magic duel of champions, is there some setting I can do to improve, or some mod? For might and magic, is there any mod that? Or some setting that I can improve it?

I haven't played that, but a quick search indicates that you can set the resolution in its configuration file:

%USERPROFILE%\My Documents\Ubisoft\Might and Magic Duel of Champions\config.ini

I looked where you said , just that this game did not create that folder where you mentioned the only thing like that I was able to find a folder within the folder where the game was installed called config , but the problem is that this file text has no resolution. Look what ta written :

[ APPLICATION ]
PATH = MMDoC - PDCLive
FILE = Game.exe
NAME = Might & Magic - Duel of Champions
ENVIRONMENTPATH ​​= MMDoC - PDCLive
PORT = 12222
= 0.5 REQUIRED_SPACE
UPNP_TIMEOUT = 86400

[ BLOOMBERG ]
STORAGE_URL = http://uat-storage.ubi.com/
CRASH_ENABLE = 0
CRASH_BUCKET = CrashReports - MMDoC - PDCLive
CRASH_FOLDER = BloombergReports
CLIENT_LOG_ENABLE = 0
CLIENT_LOG_BUCKET = ClientLogs - MMDoC - PDCLive
CLIENT_LOG_FOLDER = Logs
LAUNCHER_LOG_ENABLE = 0
LAUNCHER_LOG_BUCKET = LauncherLogs - MMDoC - PDCLive
LAUNCHER_LOG_FOLDER = LauncherLogs

[ LOCALIZATION ]
LANG = Inglês

[ NET ]
CDN_URLS = http://pdc-doc-launcher.ubi.com
VERSION_URL = http://pdc-doc-launcher.ubi.com/Patches/MMDoC-PDCLive.txt
VERSION_TARGET = MMDoC - PDCLive
ENCRYPTION = 0

[ TORRENT ]
PORT = 12888
WebSeedActivationDelayInSeconds = 30
WebSeedActivationDownloadSpeedLessThan = 15360
GAME_RUNS_DOWNLOAD_SPEED = 5120
GAME_RUNS_UPLOAD_SPEED = 5120

[ LOG ]
ENABLE = 1
LEVEL = 3
ENABLEPROGESSLOG = 1
ENABLEUSERLOG = 1

[ DTOOL ]
Serverip = pdc - doc - launcher.ubi.com
HTTP = http://pdc-doc-launcher.ubi.com/Patches/MMDoC-PDCLive.txt
TRACKER = [url=http://pdc-doc-launcher.ubi.com:80/GroTracker/tracker.action/announce]http://pdc-doc-launcher.ubi.com:80/GroTracker/tracker.action/announce[/url]
SEEDER =

[ UI]
Default = https://pdc-doc-launcherweb.ubi.com/
Inglês = https://pdc-doc-launcherweb.ubi.com/?language=en
French = https://pdc-doc-launcherweb.ubi.com/?language=fr
German = https://pdc-doc-launcherweb.ubi.com/?language=de
Polish = https://pdc-doc-launcherweb.ubi.com/?language=pl
Italian = https://pdc-doc-launcherweb.ubi.com/?language=it
Spanish = https://pdc-doc-launcherweb.ubi.com/?language=es
Russian = https://pdc-doc-launcherweb.ubi.com/?language=ru
Portuguese_Brazil = https://pdc-doc-launcherweb.ubi.com/?language=pt

[ REQUIREMENTS ]
CheckDirectXVersionExeName = DirectXCheckRequirement.exe
CheckDirectXVersionArguments = / silent


There's nothing about the resolution, I also looked at some sites, but do not think anything I only have this problem? ://///