adding property to UI spreadsheet cell

[Anonymous]

I want to be able to manipulate an object's property from a cell in FBSpread, but having trouble adding the property. For instance, the play speed of a video clip:

double* lValue;
lClip->PropertyList.Find( "PlaySpeed" )->GetData( &lValue, sizeof(lValue));

Now to add that value to the spread cell and have the functionality to alter the value from within the spread is whats eluding me. Do I need to set the cell to actually be an instance of FBEditProperty first then reference the property I want from there?