DFM File: What is it?

Researcher:   |   Updated: November 26, 2018

Microsoft Silver

DFM File Summary

Most DFM files can be viewed with eight known software applications, typically Notepad++ developed by Don Ho. It's main file type association is the Pascal File format, but also includes seven other rarely-seen file types. The majority of DFM files are considered Text Files, but they can also be Data Files or Developer Files.

The DFM File Extension can be viewed on the Windows, Mac, and Linux operating systems. They are supported on both desktop and mobile devices. The main DFM file type has a Popularity Rating of "Low", meaning these files are not frequently present on your typical desktop or mobile device.

To learn more about DFM files and their associated software applications, please see the information below. Plus, we provide a basic troubleshooting guide to solve problems with opening DFM files.

Low
Prevalence
6997
Ranking

/ 11690

Active

Importance

26

November

2018

Refreshed

FileViewPro Opens DFM Files

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Known DFM Files

  8 known file types use this extension

Principal DFM Type

.DFM
Formatting:.dfm
Class:Pascal File

INC file stores various data used for programming applications developed by Pascal programming language and development environments.

Created by: Open Source
Division:Text Files
Folder: HKEY_CLASSES_ROOT\.dfm

Software Programs That Open The Pascal File:


Notepad++ by Don Ho

Windows
Mac
Linux

ExtendScript Toolkit (ESTK) by Adobe Systems Incorporated

Windows

Secondary DFM Associations

.DFM
Formatting:.dfm
Class:Midas ViewPoint Display Form
.DFM
Formatting:.dfm
Class:Delphi Form
.DFM
Formatting:.dfm
Class:Data Flow Diagram Model (Prosa)
.DFM
Formatting:.dfm
Class:C++ Builder 6 Form File
.DFM
Formatting:.dfm
Class:Digital-FM File
.DFM
Formatting:.dfm
Class:Autodesk Drawing Specific Settings
.DFM
Formatting:.dfm
Class:Help & Manual eBook Template

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DFM Demand


Top Devices

SamsungAppleHuaweiXiaomiLGSamsung: 41%Apple: 31%Huawei: 13%Xiaomi: 10%LG: 4%
Samsung (28.86%)
Apple (21.83%)
Huawei (9.25%)
Xiaomi (6.74%)
LG (3.11%)

Browser Rankings

ChromeFirefoxInternet ExplorerEdgeSafariChrome: 64%Firefox: 12%Internet Explorer: 10%Edge: 9%Safari: 4%
Chrome (58.80%)
Firefox (11.05%)
Internet Explorer (9.04%)
Edge (8.46%)
Safari (3.87%)


Understanding DFM Issues


Common DFM Opening Problems

Notepad++ Isn't There

When trying to open your DFM file, you get the error "Can't Open DFM File Type". If this is the case, it's usually due to the fact that you do not have Notepad++ for - installed on your computer. This will prevent you from double-clicking to open the DFM file because the OS doesn’t know how to handle it.


Tip: If you have another software that you know opens DFM files, you can select it by hitting the "Show Apps" button.


Incorrect Notepad++ Version

Occasionally, you might have an outdated version of Notepad++ installed that's incompatible with your Pascal File type. Installing the latest version of Notepad++ from Don Ho is recommended. This issue mainly occurs when your Pascal File file was created by a newer version of Notepad++ than you have on your PC.


Tip: Investigate your DFM file by right-clicking and selecting "Properties" to find clues on what version you need.


Ultimately, most of the difficulties opening DFM files are due to having the wrong version of Notepad++ installed.


Other Causes of DFM File Opening Problems

Assuming you have the right Notepad++ version installed, other problems can prevent you from opening DFM files. There can be external issues inside of - that are causing these errors when opening DFMs. Problems unrelated to software:

  • Corrupt Windows Registry file path references for DFM
  • Accidental deletion of the description of the DFM file in the Windows registry
  • Defective install of a DFM program, such as Notepad++
  • Your DFM file is corrupted (issues with your Pascal File file itself)
  • Malware-tainted DFM file can't be opened
  • Device drivers for DFM-related hardware are out-of-date
  • Insufficient system resources to successfully open Pascal File files

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