To Disable a Record in Form by Unchecking a Check BOX in that record Task 3

create a new method in form methods

void method1()
{
if(datasourcename.checbox == noyes::Yes)
{
datasource_ds.allowedit(false)
}
else
{
datasource_ds.allowedit(true)
}
}

Now call this method in your datasource active method and in the checkbox field's modified method