its just a lookup table -- make a table of images and draw the image required for the character(s) that match it (so a map of string to image would be straightforward).
your GUI (whatever is giving you buttons to mash) should also support simple images drawn into a window.
<< System.Resources.MissingManifestResourceException: 'Could not find any resources appropriate for the specified culture or the neutral culture. Make sure "CppCLRWinformsProjekt.Form1.resources" was correctly embedded or linked into assembly "Emoji_Keybord" at compile time, or that all the satellite assemblies required are loadable and fully signed.' >>
You are trying to access something you did not put into the program, similar to calling a library function with just the header and forgetting the lib file.
I don't know exactly what or where you did that; the IDE should be in the place where it was broken so whatever line it stops on is trying to access something you don't have. Did you copy something from somewhere else and just shove the code in? That rarely works in GUI programming.