Added code to look up main program symbols - unix only. PLEASE FIX FOR MSW.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2931 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dynlib.h

@@ -76,6 +76,9 @@ class wxDllLoader
        @return A handle to the loaded DLL. Use success parameter to test if it is valid.
    */
    static wxDllType LoadLibrary(const wxString & libname, bool *success);
+   /** This function returns a valid handle for the main program
+       itself. */
+   static wxDllType GetProgramHandle(void);
    /** This function resolves a symbol in a loaded DLL, such as a
        variable or function name.
        @param dllHandle Handle of the DLL, as returned by LoadDll().