phoneInitializeEx

How do I initialize the dwOptions member of struct phoneinitializeexparams_tag.
this is what i have.
PHONEINITIALIZEEXPARAMS lpPhoneInitializeExParams;
DWORD op=NULL;
lpPhoneInitializeExParams.dwOptions=op;
This returns error Access Violation

lpPhoneInitializeExParams->dwOptions=op;
This returns an error as well

http://msdn.microsoft.com/library/de...stnts_4xyr.asp
http://msdn.microsoft.com/library/de...func2_1tbs.asp
http://msdn.microsoft.com/library/de...truc2_6ohe.asp
Have fun

-Prelude