This event allows you to monitor value changes. This event can be invoked immediately or when the next action (button) is performed. As an example in this sample scenario you will monitor the change of the combo box operation.
From the palette, select an Output component and drop it to the right of the operation combo box (Figure 17-38). You will place a text there when the operation has changed.
Figure 17-38. Output text to monitor changes in the combo box values
In the Properties view, change the Id to Opchanged. Make sure the output component is still selected.
Figure 17-39. Properties view ...