.MPX File Extension
File Type 1FoxPro Compiled Menu Program
What is an MPX file?
FoxPro menu program compiled from a .MPR file
File Type 2Microsoft Project Exchange File
.MPX File Association 2
File exported by Microsoft Project, a project management application; saves the project plan in an ASCII text format instead of the .MPP binary format; designed for exchanging project data between different versions of Project as well as with third-party programs.
Several third-party programs can export and import MPX files. The MPXJ Java library can be used for implementing MPX import and export functionality in third-party applications.