<p style="margin-top: 0px; margin-right: 0px; margin-bottom: 1em; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 0px; border-left-width: 0px; border-style: initial; border-color: initial; font-size: 14px; vertical-align: baseline; background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: transparent; clear: both; word-wrap: break-word; background-position: initial initial; background-repeat: initial initial; "> I would like to know when CTRL or ALT are being pressed in my sugar activity. To be complete, I would need to know if they are pressed when the activity regains focus (e.g. changing activities or if the focus was in a textfield). <p style="margin-top: 0px; margin-right: 0px; margin-bottom: 1em; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 0px; border-left-width: 0px; border-style: initial; border-color: initial; font-size: 14px; vertical-align: baseline; background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: transparent; clear: both; word-wrap: break-word; background-position: initial initial; background-repeat: initial initial; "> I am not sure of the right way to do this. My current thinking is to keep a dictionary with CTRL_L, CTRL_R, ALT_L, and ALT_R key states which are updated on key-press and key-release events. <p style="margin-top: 0px; margin-right: 0px; margin-bottom: 1em; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 0px; border-left-width: 0px; border-style: initial; border-color: initial; font-size: 14px; vertical-align: baseline; background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: transparent; clear: both; word-wrap: break-word; background-position: initial initial; background-repeat: initial initial; "> But this model breaks as soon the application loses focus and the user releases one of those keys -- I would never know when there is a mouse-up. My workaround is to clear the dictionary when the application loses focus. I can also attempt to update the dictionary when there are mouse events by skimming information from these events regarding CTRL and ALT modifiers. <p style="margin-top: 0px; margin-right: 0px; margin-bottom: 1em; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 0px; border-left-width: 0px; border-style: initial; border-color: initial; font-size: 14px; vertical-align: baseline; background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: transparent; clear: both; word-wrap: break-word; background-position: initial initial; background-repeat: initial initial; "> Is this a good approach? Maybe I am missing something obvious?