De or het vensterprogrammering?

The correct Dutch article is:

de vensterprogrammering

Rule Words ending in -ing: almost always de. See the rule

How to use vensterprogrammering

the vensterprogrammeringde vensterprogrammering
this vensterprogrammeringdeze vensterprogrammering
that vensterprogrammeringdie vensterprogrammering
our vensterprogrammeringonze vensterprogrammering
your vensterprogrammeringjouw vensterprogrammering
every vensterprogrammeringelke vensterprogrammering
which vensterprogrammering?welke vensterprogrammering?
a big vensterprogrammering / the big vensterprogrammeringeen grote vensterprogrammering, de grote vensterprogrammering