Hi Gimmy,
If you mean from PowerServer Mobile, you can use the iNet object::
String ls_code= 'post?message=Hello%20Appeon%20mobile!'
If MessageBox(ls_code, 'Tweet it?', Question!, YesNo!, 1) = 1 Then
l_inet.hyperlinktourl('twitter://' + ls_code)
End If
If you want to make it from PB desktop app, you can use the HTTPclient object to call the Twitter REST API.
Best,
.m