We need to call an Add-in from other component (other solution) by ProgID like
UID commandID = new UIDClass();
commandID.Value = "ArcMapAddin1.Button1"; // we tried "ArcMapAddin1_Button1" with no success
//ICommandItem comm = m_application.Document.CommandBars.Find(commandID); // old stuff worked for ICommand to find other ICommand
var comm2 = m_application.FindExtensionByCLSID(commandID);
Is it possible?
We try and "Find" returns null.