void Switch::MouseMove(Point p, dword keyflags) {
    Cout() << "Switch::MouseMove(): "; 
    ...
}

// Add log for the rest of events and try to understand the logic...
void Switch::LeftDown(Point p, dword keyflags) { ... }
void Switch::LeftUp(Point p, dword keyflags) { ... }
void Switch::MouseLeave() { ... }

Cout() << "My message!" << "\n";