After I use SetStretchBltMode, to set the desired mode for StretchBlt, am I required to set it back to the default value before closing the program associated with the given hDC? I don't intend to use any value for the StretchBlt mode other than mode 3 (which is STRETCH_DELETESCANS). However, if I close my program who's main window is associated with that hDC, prior to restoring the original StretchBlt mode for that hDC, will this cause some system instability or something?