SSRS reports 2012

hi all,

i wanted to ask you all that i know how to  create ssrs reports in ax 2012 with help of visual studio and ax.

Now i need a dialog box to add filter to the data and design to the report .How do i add a dialog box in ssrs report i have done in morphx reports but don't know how to add filter in dialog box in ssrs reports can any one help me?