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diff --git a/shell/source/tools/lngconvex/cmdline.hxx b/shell/source/tools/lngconvex/cmdline.hxx
new file mode 100644
index 000000000000..b7c5e5453136
--- /dev/null
+++ b/shell/source/tools/lngconvex/cmdline.hxx
@@ -0,0 +1,104 @@
+#ifndef _CMDLINE_HXX_
+#define _CMDLINE_HXX_
+
+#include "defs.hxx"
+
+//---------------------------------
+/** Simple command line abstraction
+*/
+
+class CommandLine
+{
+public:
+
+    //################################
+    // Creation
+    //################################
+
+
+    CommandLine(size_t argc, char* argv[], const std::string& ArgPrefix = std::string("-"));
+
+
+    //################################
+    // Query
+    //################################
+
+
+    /** Return the argument count
+    */
+    size_t get_arg_count() const;
+
+    /** Return an argument by index
+        This method doesn't skip argument
+        names if any, so if the second
+        argument is an argument name the
+        function nevertheless returns it.
+
+        @precond    0 <= Index < GetArgumentCount
+
+        @throws std::out_of_range exception
+        if the given index is to high
+    */
+    std::string get_arg(size_t Index) const;
+
+    /** Returns all argument name found in the
+        command line. An argument will be identified
+        by a specified prefix. The standard prefix
+        is '-'.
+        If there are no argument names the returned
+        container is empty.
+    */
+    StringListPtr_t get_arg_names() const;
+
+    /** Returns an argument by name. If there are
+        duplicate argument names in the command line,
+        the first one wins.
+        Argument name an the argument value must be separated
+        by spaces. If the argument value starts with an
+        argument prefix use quotes else the return value is
+        an empty string because the value will be interpreted
+        as the next argument name.
+        If an argument value contains spaces use quotes.
+
+        @precond    GetArgumentNames() -> has element ArgumentName
+
+        @throws std::invalid_argument exception
+        if the specified argument could not be
+        found
+    */
+    std::string get_arg(const std::string& ArgumentName) const;
+
+
+    //################################
+    // Command
+    //################################
+
+
+    /** Set the prefix used to identify arguments in
+        the command line.
+
+        @precond    prefix is not empty
+
+        @throws std::invalid_argument exception if
+        the prefix is empty
+    */
+    void set_arg_prefix(const std::string& Prefix);
+
+private:
+
+    /** Returns whether a given argument is an argument name
+    */
+    bool is_arg_name(const std::string& Argument) const;
+
+private:
+    size_t      m_argc;
+    char**      m_argv;
+    std::string m_argprefix;
+
+// prevent copy and assignment
+private:
+    CommandLine(const CommandLine&);
+    CommandLine& operator=(const CommandLine&);
+};
+
+#endif