getrect and ginput are not supported by codegen

Hi guys. I am developing a .DLL using the command "codegen", and in an intermediate process I need to select some data from a plot made by the .DLL, then the operations dependent on this selected data continue. For this I am using the "getrect" and "ginput" functions, however, when compiling the .DLL a message appears saying that these functions are not supported by "codegen". In that sense, is there any other function that is supported by "codegen" that I can use?