glutAttachMenu - attaches a mouse button for the current window to the identifier of the current menu; glutDetachMenu - detaches an attached mouse button from the current window.
void glutAttachMenu (int button); void glutDetachMenu (int button);
glutAttachMenu attaches a mouse button for the current window to the identifier of the current menu; glutDetachMenu detaches an attached mouse button from the current window. By attaching a menu identifier to a button, the named menu will be popped up when the user presses the specified button. button should be one of GLUT_LEFT_BUTTON, GLUT_MID- DLE_BUTTON, and GLUT_RIGHT_BUTTON. Note that the menu is attached to the button by identifier, not by reference.