What is .DCL file extension?
Custom dialog definition file used by AutoCAD, a CAD design and documentation software application; contains dialog box settings, such as the title, buttons, text, list boxes, and other components; typically referenced by an application component, which displays the dialog box in order to receive user input.
DCL files are saved in a plain text format and are written using the AutoCAD's Dialogue Control Language (DCL) programming language.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.