Detecting a graffiti tap - solution?

[Dave Johnson]

After some experimentation, this scheme for detecting a tap in the 
graffiti area seems to be working fine so far:

// Form's even handler...
                switch (eventP->eType) 
                {
     case nilEvent:
                          case keyDownEvent:
                          // if we're in full screen mode, and there are points in the 
graffiti queue,
                          // there was a tap or stroke. Go back to normal.
                                 if( trapGraffitiTaps )
                                 {
                                             UInt16 numPoints;
                                             GrfGetNumPoints( &numPoints );
                                             if( numPoints > 0 )
                                             {
               // A tap or stroke occurred, respond here
                                                         GrfFlushPoints();
                                                         handled = true;
                                             }
                                 }
                                 break;

     ...
        
Here's the question, though: I reliably get a nil event on a single tap 
in the graffiti area with each OS I've tried (3.1 through 3.5), but is 
this an undocumented side effect or a "real" occurrence I can rely on?

Thanks for any illumination on this,

Dave Johnson

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