Extending Microsoft Dynamics 365 for Operations Cookbook

How it works...

The first part is to use a custom form. The binding to the lookup event is done using a specific event handler for this purpose. These events have one very important feature, apart from allowing us to bind to a form control event; in that, they pass the arguments object as a FormControlEventArgs object.

We can then cast this as a FormControlCancelableSuperEventArgs object. When we call the CancelSuperCall() method, it tells the calling control not to call its super. In the case of a lookup event, we would otherwise end up with two lookups: our new lookup and then the standard lookup.

Apart from gathering information, the other key part is that we construct the FormRun object using a factory, which creates FormRun so that it ...