	// Extract the 'what' atom to find out what kind of effect it is.
	// This information is returned to us by the effects dialog which
	// is invoked using the QTStandardParameterDialogDoAction function.
	// We'll use this information when we build the effects description
	// a bit further down in the code.
	
	{
		QTAtom			myEffectAtom;
		QTAtomID		myEffectAtomID;
		long			myEffectCodeSize;
		Ptr				myEffectCodePtr;

		myEffectAtom = QTFindChildByIndex(gEffectSample, kParentAtomIsContainer, kParameterWhatName, kParameterWhatID, &myEffectAtomID);
		
		myErr = QTLockContainer(gEffectSample);
		BailError(myErr);

		myErr = QTGetAtomDataPtr(gEffectSample, myEffectAtom, &myEffectCodeSize, &myEffectCodePtr);
		BailError(myErr);

		if (myEffectCodeSize != sizeof(OSType)) {
			myErr = paramErr;
			goto bail;
		}
		
		// get the effect code
		myEffectCode = *(OSType *)myEffectCodePtr;		// "tsk"
		myEffectCode = EndianU32_BtoN(myEffectCode);	// because the data is read from an atom container
		
		myErr = QTUnlockContainer(gEffectSample);
		BailError(myErr);
	}
