https://forge.codesys.com/forge/talk/Visualization/thread/dea705b302/2026-04-09T11:11:28.571000ZRecent posts to Combo box drop-down invisible2026-04-09T11:11:28.571000Z2026-04-09T11:11:28.571000Zconfrehttps://forge.codesys.com/u/confre/https://forge.codesys.come2e0899de7356f20f5fef71b97b6cc544416e356

<div class="markdown_content"><p>Hi,<br/> I created a combo box and I need to know when the drop‑down menu is open, in order to avoid hiding the combo box while the drop‑down is visible.<br/> Alternatively, if it’s not possible to detect whether the drop‑down is open, I would like to know how to close or hide the drop‑down programmatically when the combo box is made invisible.</p> <p>I'm using Codesys 3.5 SP19 on IFM CR1074 without touch screen (with standard keyboard handling)<br/> Thanks.</p></div>