Implementing help on touchscreen interface

Question

Hi I am currently working on a Human Machine Interface which is just a touchscreen UI which controls a machine. Now I want to implement help on the several buttons on this UI. What I want to do is tte following: - the user clicks on the help button (which is a normal .Net button with a help icon) - the form will be set in some kind of Help mode - the user clicks another button (which is also a normal .Net button) - a small window with some help about this button will be shown My question is the following: how do I prevent that the normal button click event is fired when the form is in this Help mode? Thx for your answers Dennieku

Jan Montano · Answer

Hi If you really want the click event not to trigger you should remove it's event handler when you're to enter help mode. this.button1.Click -= new System.EventHandler(this.button1_Click); Then as soon as you're not in help mode anymore (maybe upon the help form's exit or whatever) you could add it back. this.button1.Click += new System.EventHandler(this.button1_Click); Another option would be just to have a module-level variable such as bool isHelpMode; then checking inside the button click if it is indeed not in help mode before proceeding.