fDragMessageSize
fDragMessageSize = length;
if (transit == B_EXITED_VIEW && fDragMessageSize > 0) {
fDragMessageSize = -1;
fDragMessageSize = size;
} else if (fDragMessageSize > 0) {
int32 end = start + fDragMessageSize - 1;
fDragMessageSize = -1;
int32 fDragMessageSize;