Hi Everyone!! I am currently using MSVAD driver for my application. Is it possible to define user defined IOTCL calls with the current MSVAD sample available. This is what I want to do. The 2 basic API's CopyTo and CopyFrom has to be called from my application through the IOTCL that i have defined instead of the exisiting KStreaming. (like.. KS_START, KS_RUN). Can this be done? Will defining DeviceIOControl at the start of AddDevice work? Or is there a better way to do? Thanks in Advance