This one has me stumped. A field has a search help "button" at the right hand side, not immediately obvious to the users. I want to suppress this but place a BIG button that performs the same function to the right of the line. How can I get the original function code of the SAP button?

You have two possible ways to get the internal function code for an SAP pushbutton:

(Alternative 1)
Click the button with the mouse, but do not release the mouse button (this would immediately invoke the function). Instead, press F1 now while holding the mouse button down. The SAP system will then display a small window that contains the internal function code.

(Alternative 2)
Activate "Input Recording" in the GuiXT window. Click the button. Display the recorded InputScript, it now contains the internal function code.