# How to use "call Postmessage" and "Whene receives message" with Web viewer? **URL:** \ **Category:** Questions about Thunkable X\ **Created:** [March 20, 2020, 10:29am UTC](https://community.thunkable.com/t/how-to-use-call-postmessage-and-whene-receives-message-with-web-viewer/525168 "2020-03-20T10:29:29Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![jared](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/jared/32/138473_2.png) [@jared](https://community.thunkable.com/u/jared)\ **Post date:** [March 20, 2020, 11:28am UTC](https://community.thunkable.com/t/how-to-use-call-postmessage-and-whene-receives-message-with-web-viewer/525168/2 "2020-03-20T11:28:25Z")
Can you provide more info? Do you have an example of the type of info you need to transmit? I use API gets and posts to send and receive data Here is one example post > [@Help with POST and PHP](http://community.thunkable.com/t/help-with-post-and-php/518771): > > Hi my friends, i am tryng to send post data to a php server, in app inventor i have no problem but i can not achieve in thunkable x i have that blocks in app inventor. Please help me! pray pray pray > [@altsoftcode](#): > > I have already made some attempts Can you show block setups for what you’ve tried already? It’s possible you were on the right path and just a need a slight bump to stay on course --- _[View the full topic](https://community.thunkable.com/t/how-to-use-call-postmessage-and-whene-receives-message-with-web-viewer/525168)._