---
layout: default-layout
title: How to enable DPM?
keywords: Dynamsoft Barcode Reader, FAQ, tech basic, enable DPM
description: How to enable DPM?
needAutoGenerateSidebar: false
---

# How to enable DPM?

To enable DPM, assign the `DPMCRM_GENERAL` enumeration to the `DPMCodeReadingModes` array.

You can use [OutputSettingsToFile](https://www.dynamsoft.com/capture-vision/docs/server/programming/cplusplus/api-reference/capture-vision-router/settings.html?product=dbr&repoType=server#outputsettingstofile) to save the current runtime settings into a JSON file:

```cpp
int OutputSettingsToFile(const char* templateName, const char* filePath)
```

Here is a JSON snippet for enabling DPM, update it in your output template:

```json
    "BarcodeReaderTaskSettingOptions" :
    [
        {
            "DPMCodeReadingModes" :
            [
                {
                    "Mode" : "DPMCRM_GENERAL"
                }
            ]
        }
    ]
```

Once the JSON string is set, you can initialize the runtime settings to use it via the [InitSettingsFromFile](https://www.dynamsoft.com/capture-vision/docs/server/programming/cplusplus/api-reference/capture-vision-router/settings.html?product=dbr&repoType=server#initsettingsfromfile) to update your current runtime settings with your modified template:

```cpp
int InitSettingsFromFile(const char* filePath, char errorMsgBuffer[]=NULL, const int errorMsgBufferLen=0)
```

Please note that if you are modifying any other settings, you can include them in the JSON string/file as well, or you can access them individually after calling either of the aforementioned methods.