struct IBtn // button structure - send an array of there after the IS_BTN header (below)
{
byte MaxType; // max chars in typed reply (1 to 31 - 0 means remove a button)
byte ClickID; // button identifier (0 to 159)
byte BStyle; // button style flags - see below
byte Zero; // reserved
[B] byte L; // coordinates of button corners
byte T; // these run from 0 (left, top) to 200 (right, bottom)
byte R; // you should avoid overlapping LFS text by keeping
byte B; // the buttons in the left middle area of the screen
[/B]
char Text[32]; // button text - last byte must be zero
};