Question about the fSources argument to SHChangeNotifyRegister

[Jay Yang]

Hi,

Could someone who understands the fSources argument to 
SHChangeNotifyRegister explain it to me? MSDN says it can take some 
combination of SHCNRF_InterruptLevel, SHCNRF_ShellLevel, 
SHCNRF_RecursiveInterrupt, and SHCNRF_NewDelivery. I've looked at the 
source and it seems that the only one wine handles differently is 
SHCNRF_NewDelivery, so what do the others mean? MSDN says something 
about it but quite frankly I don't know what the difference between 
interrupt level and shell level notifications are. Also the the only 
place in the tree where wine uses this function, in 
dlls/shell32/shlview.c, it gets passed SHCNF_IDLIST, which isn't even 
one of the values. SHCNF_IDLIST happens to be defined as 0, but I think 
that's irrelevant.

Thanks
--
Jay Yang