void MyFrame::OnMouse(wxMouseEvent& event) { if (event.AltDown()) { std::cout << "Alt key held down during mouse event" << std::endl; } }
void MyPanel::OnMouse(wxMouseEvent& event) { if (event.AltDown()) { this->SetBackgroundColour(wxColour(255, 0, 0)); // Set background color to red this->Refresh(); // Redraw panel with new background color } }In both examples, we are using the wxMouseEvent AltDown method to check whether the "Alt" key was held down during a mouse event. Depending on the situation, we are then executing different actions (printing a message, changing the background color). The package library used in these examples is wxWidgets.