openfile dialog

hi..
now i'm trying to use the openfiledialog in a gui app .. what i have done till now is that
1. open visual stdio 2008
2. select c++ project
3. select windows application project
4. drag the openfile dialog from tool box and drop it on the form .. then i stopped coz i don't know what should i do after that

plz any one can help me !!
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