I have this delicious dish with gravy I did yesterday, and the rest is still in the pyrex-like oven proof glassware used to cook it.  Can I "cheat" and quickly reheat directly on my vitro ceramic stove top ? That would seem much quicker than reheating it the oven, and would save dish washing compared to transfering the contents into a frying pan.  My core question is specifically about the integrity of the glassware (though I'm aware it should reheat less uniformly than in the oven).  There is a related question that I found, but it is about a bowl that was not especially made for the oven at all, so I guess this question is different. 
I would absolutely not recommend heating Pyrex with any type of direct heat, ever.    That stuff goes off like a hand-grenade, highly dangerous - not to mention messy.   I've seen it happen too many times for it to be even vaguely worth the risk; even when accidentally placed on recently switched-off hobs.   Pyrex is a low-expansion glass. However, low-expansion does not mean zero-expansion, so if the bottom is being heated whilst the top stays cool, the expansion difference is enough to cause it to simply explode all over the kitchen.  Yes to microwave, but a solid no for a hob. [& I'm talking UK Pyrex, I didn't know US was even worse until I read the Pyrex wikipedia page ChrisH posted]  If you have no microwave, then either oven or transfer it to a pan. The extra washing up is safer & far less hassle than trying to clean the hob, then find all the really really sharp glass shards that will find every corner of a 20m square room. 