{
[FormDataSourceEventHandler(formDataSourceStr(CustTable, CustTable), FormDataSourceEventType::Activated)]
public static void CustTable_OnActivated(FormDataSource sender, FormDataSourceEventArgs e)
{
CustTable custTable = sender.cursor(); //selected record
FormDataSource custTable_ds = sender.formRun().dataSource("CustTable"); //DataSource form CustTable
FormRun element = sender.formRun(); //form element
FormControl myNewButton = element.design(0).controlName("MyNewButton"); //New button on the form
myNewButton.enabled(false); //Here you do your code to enabled or disabled the button
}
}