API warning handling
'int' is the severity; 0 for msg, 1 for warning
'const char *' is the text of the message
callbacks will occur directly after the API function is called that generated the warning or message
public static void SetWarningMessageHook(SteamAPIWarningMessageHook_t pFunction) { InteropHelp.TestIfAvailableClient(); NativeMethods.ISteamUtils_SetWarningMessageHook(pFunction); }