MikiMikuDance models (.pmd) can be possibly exported and translated to numerous other 3D model formats, including models used by Microsoft Direct-X. You can do that with programs like Pmx Editor or similar. Perhaps some professional 3D modeling tools may also be of help here, but that may require a plugin.
Convert MikuMikuDance model to Microsoft Direct-X SDK 3D graphics.
We found one software available in the database for this conversion.
Microsoft Windows software - convert pmd to x on Windows
PMD, PMX, X MikuMikuDance model editor
Convert from pmd file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.