Register a win32 window class for SDL's use.
int SDL_RegisterApp(const char *name, Uint32 style, void *hInst);
|name||the window class name, in UTF-8 encoding. If NULL, SDL currently uses "SDL_app" but this isn't guaranteed.|
|style||the value to use in WNDCLASSEX::style. If
|hInst||the HINSTANCE to use in WNDCLASSEX::hInstance. If zero, SDL will use
Returns 0 on success, -1 on error. SDL_GetError() may have details.
This can be called to set the application window class at startup. It is safe to call this multiple times, as long as every call is eventually paired with a call to SDL_UnregisterApp, but a second registration attempt while a previous registration is still active will be ignored, other than to increment a counter.
Most applications do not need to, and should not, call this directly; SDL will call it when initializing the video subsystem.
This function is available since SDL 2.0.2.