I Developed Mobile app in Appeon Powerbuilder2019 , i want to send diamond
Inventory to my customer on whatsapp. 
but didn't find way to share my data on whatsapp via powerbuilder 

in android platforms there is way in which we can do it 

Like most social apps on Android, WhatsApp listens to intents to share media and text. Simply create an intent to share text, for example, and WhatsApp will be displayed by the system picker:

Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
sendIntent.setType("text/plain");
startActivity(sendIntent);