Q: How can I add the TextChanged event for the textBox control during extension development with SuperMap iDesktop 8C?

A: If you add a textbox control in the layout, the system will enter the MainForm_Loaded method of the DesktopPlugin.cs class (the DesktopPlugin.cs class is created while creating the plugin, and its name is identical to that of the plugin) after the launching of the desktop. You can acquire the textbox control in the method and add the TextChanged event for the control.