I notice several statments using this kind of form
So is there an API or documentation for this kind of command ,"'^SHO-1,1'" or "ˆTXT, or other else command
It's all in the documentation for the panels, online at AMX. Note that some of the old style G3 "^" commands are not supported in G5. It's all in the manuals and "Design Considerations" documents from AMX.