use rtti as shortcut for runtime type information

[wxWidgets.git] / docs / doxygen / mainpages / platdetails.h

/////////////////////////////////////////////////////////////////////////////
// Name:        platdetails.h
// Purpose:     Platform details page of the Doxygen manual
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////


/*!

 @page page_platdetails Platform details

 wxWidgets defines a common API across platforms, but uses the native graphical
 user interface (GUI) on each platform, so your program will take on the native
 look and feel that users are familiar with. Unfortunately native toolkits and
 hardware do not always support the functionality that the wxWidgets API
 requires. This chapter collects notes about differences among supported platforms
 and ports.

 @li @ref page_platdetails_wxgtkport
 @li @ref page_platdetails_wxmacport
 @li @ref page_platdetails_wxos2port
 @li @ref page_platdetails_wxmglport
 @li @ref page_platdetails_wxx11port
 @li @ref page_platdetails_wxmswport
 @li @ref page_platdetails_nativedocs


 <hr>



 @section page_platdetails_wxgtkport wxGTK port
 
 wxGTK is a port of wxWidgets using the GTK+ library.
 It makes use of GTK+'s native widgets wherever possible and uses
 wxWidgets' generic controls when needed. GTK+ itself has been
 ported to a number of systems, but so far only the original X11
 version is supported. Support for other GTK+ backends is planned,
 such as the new DirectFB backend.
 
 All work is being done on GTK+ version 2.0 and above. Support for
 GTK+ 1.2 will be deprecated in a later release.
 
 You will need GTK+ 2.0 or higher which is available from:
 
 http://www.gtk.org
 
 The newer version of GTK+ you use, the more native widgets and
 features will be utilized. We have gone to a great extent to
 allow compiling wxWidgets applications with a latest version of
 GTK+, with the resulting binary working on systems even with a
 much lower version of GTK+. You will have to ensure that the
 application is launched with lazy symbol binding for that.
 
 In order to configure wxWidgets to compile wxGTK you will 
 need use the @c --with-gtk argument to the @c configure script.
 This is the default for many systems.
 
 GTK+ 1.2 can still be used, albeit discouraged. For that you can
 pass @c --with-gtk=1 to the @c configure script.
 
 For further information, please see the files in docs/gtk
 in the distribution.
 
 
 
 
 @section page_platdetails_wxmacport wxMac port
 
 wxMac is a port of wxWidgets for the Macintosh OS platform.
 Currently MacOS 8.6 or higher, MacOS 9.0 or higher and
 MacOS X 10.0 or higher are supported, although most development
 effort goes into MacOS X support. wxMac can be compiled both
 using Apple's developer tools and MetroWerks CodeWarrior in
 different versions. Support for MacOS 8.X and MacOS 9.X is
 only available through CodeWarrior. wxMac uses the Carbon
 API (and optionally the Classic API under MacOS 8.X). You
 will need wxWidgets version 2.3.3 or higher for a stable
 version of wxMac.
 
 For further information, please see the files in docs/mac
 in the distribution.
 
 
 
 
 @section page_platdetails_wxmglport wxMGL port
 
 wxMGL is a port of wxWidgets using the MGL library available
 from SciTech as the underlying graphics backend. wxMGL draws
 its widgets using the wxUniversal widget set which is now
 part of wxWidgets. MGL itself runs on a variety of platforms
 including DOS, Linux hardware (similar to the Linux framebuffer)
 and various graphics systems such as Win32, X11 and OS/2.
 Note that currently MGL for Linux runs only on x86-based systems.
 
 You will need wxWidgets 2.3.3 or higher and MGL 5.0 or higher.
 The latter is available from
 
 http://www.scitechsoft.com/products/product_download.html
 
 In order to configure wxWidgets to compile wxMGL you will
 need to type:
 
 @verbatim configure --with-mgl --with-universal @endverbatim
 
 Under DOS, wxMGL uses a dmake based make system.
 
 For further information, please see the files in docs/mgl
 in the distribution.
 
 
 
 @section page_platdetails_wxos2port wxOS2 port
 
 wxOS2 is a port of wxWidgets for the IBM OS/2 platform.
 It is currently under construction.
 
 
 
 @section page_platdetails_wxx11port wxX11 port
 
 wxX11 is a port of wxWidgets using X11 (The X Window System)
 as the underlying graphics backend. wxX11 draws its widgets
 using the wxUniversal widget set which is now part of wxWidgets.
 wxX11 is well-suited for a number of special applications such
 as those running on systems with few resources (PDAs) or for
 applications which need to use a special themed look. You will need
 wxWidgets 2.3.2 or higher.
 
 In order to configure wxWidgets to compile wxX11 you will 
 need to type:
 
 @verbatim configure --with-x11 --with-universal @endverbatim
 
 For further information, please see the files in docs/x11
 in the distribution. There is also a page on the use of
 wxWidgets for embedded applications on the wxWidgets web site.
 
 
 
 
 
 @section page_platdetails_wxmswport wxMSW port
 
 wxMSW is a port of wxWidgets for the Windows platforms
 including Windows 95, 98, ME, 2000, NT, XP in ANSI and
 Unicode mode (for Windows 95 through the MSLU extension
 library). wxMSW ensures native look and feel for XP
 as well when using wxWidgets version 2.3.3 or higher.
 wxMSW can be compile with a great variety of compilers
 including MS VC++, Borland 5.5, MinGW32, Cygwin and
 Watcom as well as cross-compilation with a Linux hosted
 MinGW32 tool chain.
 
 For further information, please see the files in docs/msw
 in the distribution.
 
 @subsection page_platdetails_wxmswport_themedborders Themed borders on Windows
 
 Starting with wxWidgets 2.8.5, you can specify the wxBORDER_THEME style to have wxWidgets
 use a themed border. Using the default XP theme, this is a thin 1-pixel blue border,
 with an extra 1-pixel border in the window client background colour (usually white) to
 separate the client area's scrollbars from the border.
 
 If you don't specify a border style for a wxTextCtrl in rich edit mode, wxWidgets now gives
 the control themed borders automatically, where previously they would take the Windows 95-style
 sunken border. Other native controls such as wxTextCtrl in non-rich edit mode, and wxComboBox,
 already paint themed borders where appropriate. To use themed borders on other windows, such
 as wxPanel, pass the wxBORDER_THEME style, or (apart from wxPanel) pass no border style.
 
 In general, specifying wxBORDER_THEME will cause a border of some kind to be used, chosen by the platform
 and control class. To leave the border decision entirely to wxWidgets, pass wxBORDER_DEFAULT.
 This is not to be confused with specifying wxBORDER_NONE, which says that there should
 definitely be @e no border.
 
 @subsubsection page_platdetails_wxmswport_themedborders_details More detail on border implementation
 
 The way that wxMSW decides whether to apply a themed border is as follows.
 The theming code calls wxWindow::GetBorder() to obtain a border. If no border style has been
 passed to the window constructor, GetBorder() calls GetDefaultBorder() for this window.
 If wxBORDER_THEME was passed to the window constructor, GetBorder() calls GetDefaultBorderForControl().
 
 The implementation of wxWindow::GetDefaultBorder() on wxMSW calls wxWindow::CanApplyThemeBorder()
 which is a virtual function that tells wxWidgets whether a control can have a theme
 applied explicitly (some native controls already paint a theme in which case we should not
 apply it ourselves). Note that wxPanel is an exception to this rule because in many cases
 we wish to create a window with no border (for example, notebook pages). So wxPanel
 overrides GetDefaultBorder() in order to call the generic wxWindowBase::GetDefaultBorder(),
 returning wxBORDER_NONE.
 
 @subsection page_platdetails_wxmswport_wince wxWinCE
 
 wxWinCE is the name given to wxMSW when compiled on Windows CE devices;
 most of wxMSW is common to Win32 and Windows CE but there are
 some simplifications, enhancements, and differences in
 behaviour.
 
 For building instructions, see docs/msw/wince in the
 distribution, also the section about Visual Studio 2005 project
 files below. The rest of this section documents issues you
 need to be aware of when programming for Windows CE devices.
 
 @subsubsection page_platdetails_wxmswport_wince_port General issues for wxWinCE programming
 
 Mobile applications generally have fewer features and
 simpler user interfaces. Simply omit whole sizers, static
 lines and controls in your dialogs, and use comboboxes instead
 of listboxes where appropriate. You also need to reduce
 the amount of spacing used by sizers, for which you can
 use a macro such as this:
 
 @verbatim
 #if defined(__WXWINCE__)
     #define wxLARGESMALL(large,small) small
 #else
     #define wxLARGESMALL(large,small) large
 #endif
 
 // Usage
 topsizer->Add( CreateTextSizer( message ), 0, wxALL, wxLARGESMALL(10,0) );
 @endverbatim
 
 There is only ever one instance of a Windows CE application running,
 and wxWidgets will take care of showing the current instance and
 shutting down the second instance if necessary.
 
 You can test the return value of wxSystemSettings::GetScreenType()
 for a qualitative assessment of what kind of display is available,
 or use wxGetDisplaySize() if you need more information.
 
 You can also use wxGetOsVersion to test for a version of Windows CE at
 run-time (see the next section). However, because different builds
 are currently required to target different kinds of device, these
 values are hard-wired according to the build, and you cannot
 dynamically adapt the same executable for different major Windows CE
 platforms. This would require a different approach to the way
 wxWidgets adapts its behaviour (such as for menubars) to suit the
 style of device.
 
 See the "Life!" example (demos/life) for an example of
 an application that has been tailored for PocketPC and Smartphone use.
 
 @note don't forget to have this line in your .rc file, as for
       desktop Windows applications:
 
 @verbatim #include "wx/msw/wx.rc" @endverbatim
 
 @subsubsection page_platdetails_wxmswport_wince_sdk Testing for WinCE SDKs
 
 Use these preprocessor symbols to test for the different types of device or SDK:
 
 @li @b __SMARTPHONE__ Generic mobile devices with phone buttons and a small display
 @li @b __PDA__ Generic mobile devices with no phone
 @li @b __HANDHELDPC__ Generic mobile device with a keyboard
 @li @b __WXWINCE__ Microsoft-powered Windows CE devices, whether PocketPC, Smartphone or Standard SDK
 @li @b WIN32_PLATFORM_WFSP Microsoft-powered smartphone
 @li @b __POCKETPC__ Microsoft-powered PocketPC devices with touch-screen
 @li @b __WINCE_STANDARDSDK__ Microsoft-powered Windows CE devices, for generic Windows CE applications
 @li @b __WINCE_NET__ Microsoft-powered Windows CE .NET devices (_WIN32_WCE is 400 or greater)
 
 wxGetOsVersion will return these values:
 
 @li @b wxWINDOWS_POCKETPC The application is running under PocketPC.
 @li @b wxWINDOWS_SMARTPHONE The application is running under Smartphone.
 @li @b wxWINDOWS_CE The application is running under Windows CE (built with the Standard SDK).
 
 
 @subsubsection page_platdetails_wxmswport_wince_sizing Window sizing in wxWinCE
 
 Top level windows (dialogs, frames) are created always full-screen. Fit() of sizers will not rescale top
 level windows but instead will scale window content.
 
 If the screen orientation changes, the windows will automatically be resized
 so no further action needs to be taken (unless you want to change the layout
 according to the orientation, which you could detect in idle time, for example).
 When input panel (SIP) is shown, top level windows (frames and dialogs) resize
 accordingly (see wxTopLevelWindow::HandleSettingChange).
 
 @subsubsection page_platdetails_wxmswport_wince_toplevel Closing top-level windows in wxWinCE
 
 You won't get a wxCloseEvent when the user clicks on the X in the titlebar
 on Smartphone and PocketPC; the window is simply hidden instead. However the system may send the
 event to force the application to close down.
 
 @subsubsection page_platdetails_wxmswport_wince_hibernation Hibernation in wxWinCE
 
 Smartphone and PocketPC will send a wxEVT_HIBERNATE to the application object in low
 memory conditions. Your application should release memory and close dialogs,
 and wake up again when the next wxEVT_ACTIVATE or wxEVT_ACTIVATE_APP message is received.
 (wxEVT_ACTIVATE_APP is generated whenever a wxEVT_ACTIVATE event is received
 in Smartphone and PocketPC, since these platforms do not support WM_ACTIVATEAPP.)
 
 @subsubsection page_platdetails_wxmswport_wince_hwbutt Hardware buttons in wxWinCE
 
 Special hardware buttons are sent to a window via the wxEVT_HOTKEY event
 under Smartphone and PocketPC. You should first register each required button with 
 wxWindow::RegisterHotKey, and unregister the button when you're done with it. For example:
 
 @verbatim
   win->RegisterHotKey(0, wxMOD_WIN, WXK_SPECIAL1);
   win->UnregisterHotKey(0);
 @endverbatim
 
 You may have to register the buttons in a wxEVT_ACTIVATE event handler
 since other applications will grab the buttons.
 
 There is currently no method of finding out the names of the special
 buttons or how many there are.
 
 @subsubsection page_platdetails_wxmswport_wince_dialogs Dialogs in wxWinCE
 
 PocketPC dialogs have an OK button on the caption, and so you should generally
 not repeat an OK button on the dialog. You can add a Cancel button if necessary, but some dialogs
 simply don't offer you the choice (the guidelines recommend you offer an Undo facility
 to make up for it). When the user clicks on the OK button, your dialog will receive
 a wxID_OK event by default. If you wish to change this, call wxDialog::SetAffirmativeId
 with the required identifier to be used. Or, override wxDialog::DoOK (return @false to
 have wxWidgets simply call Close to dismiss the dialog).
 
 Smartphone dialogs do @e not have an OK button on the caption, and are closed
 using one of the two menu buttons. You need to assign these using wxTopLevelWindow::SetLeftMenu
 and wxTopLevelWindow::SetRightMenu, for example:
 
 @verbatim
 #ifdef __SMARTPHONE__
     SetLeftMenu(wxID_OK);
     SetRightMenu(wxID_CANCEL, _("Cancel"));
 #elif defined(__POCKETPC__)
     // No OK/Cancel buttons on PocketPC, OK on caption will close
 #else
     topsizer->Add( CreateButtonSizer( wxOK|wxCANCEL ), 0, wxEXPAND | wxALL, 10 );
 #endif
 @endverbatim
 
 For implementing property sheets (flat tabs), use a wxNotebook with wxNB_FLAT|wxNB_BOTTOM
 and have the notebook left, top and right sides overlap the dialog by about 3 pixels
 to eliminate spurious borders. You can do this by using a negative spacing in your
 sizer Add() call. The cross-platform property sheet dialog wxPropertySheetDialog is
 provided, to show settings in the correct style on PocketPC and on other platforms.
 
 Notifications (bubble HTML text with optional buttons and links) will also be
 implemented in the future for PocketPC.
 
 Modeless dialogs probably don't make sense for PocketPC and Smartphone, since
 frames and dialogs are normally full-screen, and a modeless dialog is normally
 intended to co-exist with the main application frame.
 
 @subsubsection page_platdetails_wxmswport_wince_ppc Menubars and toolbars in PocketPC
 
 On PocketPC, a frame must always have a menubar, even if it's empty.
 An empty menubar/toolbar is automatically provided for dialogs, to hide
 any existing menubar for the duration of the dialog.
 
 Menubars and toolbars are implemented using a combined control,
 but you can use essentially the usual wxWidgets API; wxWidgets will combine the menubar
 and toolbar. However, there are some restrictions:
 
 @li You must create the frame's primary toolbar with wxFrame::CreateToolBar,
 because this uses the special wxToolMenuBar class (derived from wxToolBar)
 to implement the combined toolbar and menubar. Otherwise, you can create and manage toolbars
 using the wxToolBar class as usual, for example to implement an optional
 formatting toolbar above the menubar as Pocket Word does. But don't assign
 a wxToolBar to a frame using SetToolBar - you should always use CreateToolBar
 for the main frame toolbar.
 @li Deleting and adding tools to wxToolMenuBar after Realize is called is not supported.
 @li For speed, colours are not remapped to the system colours as they are
 in wxMSW. Provide the tool bitmaps either with the correct system button background,
 or with transparency (for example, using XPMs).
 @li Adding controls to wxToolMenuBar is not supported. However, wxToolBar supports
 controls.
 
 Unlike in all other ports, a wxDialog has a wxToolBar, automatically created
 for you. You may either leave it blank, or access it with wxDialog::GetToolBar
 and add buttons, then calling wxToolBar::Realize. You cannot set or recreate
 the toolbar.
 
 @subsubsection page_platdetails_wxmswport_wince_smart Menubars and toolbars in Smartphone
 
 On Smartphone, there are only two menu buttons, so a menubar is simulated
 using a nested menu on the right menu button. Any toolbars are simply ignored on
 Smartphone.
 
 @subsubsection page_platdetails_wxmswport_wince_closing Closing windows in wxWinCE
 
 The guidelines state that applications should not have a Quit menu item,
 since the user should not have to know whether an application is in memory
 or not. The close button on a window does not call the window's
 close handler; it simply hides the window. However, the guidelines say that
 the Ctrl+Q accelerator can be used to quit the application, so wxWidgets
 defines this accelerator by default and if your application handles
 wxID_EXIT, it will do the right thing.
 
 @subsubsection page_platdetails_wxmswport_wince_ctx Context menus in wxWinCE
 
 To enable context menus in PocketPC, you currently need to call wxWindow::EnableContextMenu,
 a wxWinCE-only function. Otherwise the context menu event (wxContextMenuEvent) will
 never be sent. This API is subject to change.
 
 Context menus are not supported in Smartphone.
 
 @subsubsection page_platdetails_wxmswport_wince_ctrl Control differences on wxWinCE
 
 These controls and styles are specific to wxWinCE:
 
 @li wxTextCtrl The wxTE_CAPITALIZE style causes a CAPEDIT control to
 be created, which capitalizes the first letter.
 
 These controls are missing from wxWinCE:
 
 @li MDI classes MDI is not supported under Windows CE.
 @li wxMiniFrame Not supported under Windows CE.
 
 Tooltips are not currently supported for controls, since on PocketPC controls with
 tooltips are distinct controls, and it will be hard to add dynamic
 tooltip support.
 
 Control borders on PocketPC and Smartphone should normally be specified with
 wxBORDER_SIMPLE instead of wxBORDER_SUNKEN. Controls will usually adapt
 appropriately by virtue of their GetDefaultBorder() function, but if you
 wish to specify a style explicitly you can use wxDEFAULT_CONTROL_BORDER
 which will give a simple border on PocketPC and Smartphone, and the sunken border on
 other platforms.
 
 @subsubsection page_platdetails_wxmswport_wince_help Online help in wxWinCE
 
 You can use the help controller wxWinceHelpController which controls
 simple @c .htm files, usually installed in the Windows directory.
 See the Windows CE reference for how to format the HTML files.
 
 @subsubsection page_platdetails_wxmswport_wince_install Installing your PocketPC and Smartphone applications
 
 To install your application, you need to build a CAB file using
 the parameters defined in a special .inf file. The CabWiz program
 in your SDK will compile the CAB file from the .inf file and
 files that it specifies.
 
 For delivery, you can simply ask the user to copy the CAB file to the
 device and execute the CAB file using File Explorer. Or, you can
 write a program for the desktop PC that will find the ActiveSync
 Application Manager and install the CAB file on the device,
 which is obviously much easier for the user.
 
 Here are some links that may help.
 
 @li A setup builder that takes CABs and builds a setup program is at
     http://www.eskimo.com/~scottlu/win/index.html.
 @li Sample installation files can be found in 
     <tt>Windows CE Tools/wce420/POCKET PC 2003/Samples/Win32/AppInst</tt>.
 @li An installer generator using wxPython can be found at 
     http://ppcquicksoft.iespana.es/ppcquicksoft/myinstall.html.
 @li Miscellaneous Windows CE resources can be found at 
     http://www.orbworks.com/pcce/resources.html.
 @li Installer creation instructions with a setup.exe for installing to PPC can be found at 
     http://www.pocketpcdn.com/articles/creatingsetup.html.
 @li Microsoft instructions are at 
     http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnce30/html/appinstall30.asp?frame=true
 @li Troubleshooting WinCE application installations: 
     http://support.microsoft.com/default.aspx?scid=KB;en-us;q181007
 
 You may also check out <tt>demos/life/setup/wince</tt> which contains
 scripts to create a PocketPC installation for ARM-based
 devices. In particular, @c build.bat builds the distribution and
 copies it to a directory called @c Deliver.
 
 @subsubsection page_platdetails_wxmswport_wince_filedlg wxFileDialog in PocketPC
 
 Allowing the user to access files on memory cards, or on arbitrary
 parts of the filesystem, is a pain; the standard file dialog only
 shows folders under My Documents or folders on memory cards
 (not the system or card root directory, for example). This is
 a known problem for PocketPC developers.
 
 If you need a file dialog that allows access to all folders,
 you can use wxGenericFileDialog instead. You will need to include 
 @c wx/generic/filedlgg.h.
 
 @subsubsection page_platdetails_wxmswport_wince_evc Embedded Visual C++ Issues
 
 <b>Run-time type information</b>
 
 If you wish to use runtime type information (RTTI) with eVC++ 4, you need to download
 an extra library, @c ccrtrtti.lib, and link with it. At the time of
 writing you can get it from here:
 
 @verbatim
 http://support.microsoft.com/kb/830482/en-us
 @endverbatim
 
 Otherwise you will get linker errors similar to this:
 
 @verbatim
 wxwince26d.lib(control.obj) : error LNK2001: unresolved external symbol "const type_info::`vftable'" (??_7type_info@@6B@)
 @endverbatim
 
 <b>Windows Mobile 5.0 emulator</b>
 
 Note that there is no separate emulator configuration for Windows Mobile 5.0: the
 emulator runs the ARM code directly.
 
 <b>Visual Studio 2005 project files</b>
 
 Unfortunately, Visual Studio 2005, required to build Windows Mobile 5.0 applications,
 doesn't do a perfect job of converting the project files from eVC++ format.
 
 When you have converted the wxWidgets workspace, edit the configuration properties
 for each configuration and in the Librarian, add a relative path ..\\..\\lib to
 each library path. For example: 
 <tt>..\\$(PlatformName)\\$(ConfigurationName)\\wx_mono.lib</tt>.
 
 Then, for a sample you want to compile, edit the configuration properties
 and make sure 
 <tt>..\\..\\lib\\$(PlatformName)\\$(ConfigurationName)</tt> 
 is in the Linker/General/Additional Library Directories property. 
 Also change the Linker/Input/Additional Dependencies property to something like 
 <tt>coredll.lib wx_mono.lib wx_wxjpeg.lib wx_wxpng.lib wx_wxzlib.lib wx_wxexpat.lib 
     commctrl.lib winsock.lib wininet.lib</tt>
 (since the library names in the wxWidgets workspace were changed by VS 2005).
 
 Alternately, you could could edit all the names to be identical to the original eVC++
 names, but this will probably be more fiddly.
 
 @subsubsection page_platdetails_wxmswport_wince_issues Remaining issues
 
 These are some of the remaining problems to be sorted out, and features
 to be supported.
 
 @li <b>Windows Mobile 5 issues.</b> It is not possible to get the HMENU for
 the command bar on Mobile 5, so the menubar functions need to be rewritten
 to get the individual menus without use of a menubar handle. Also the
 new Mobile 5 convention of using only two menus (and no bitmap buttons) needs to be
 considered.
 @li <b>Sizer speed.</b> Particularly for dialogs containing notebooks,
 layout seems slow. Some analysis is required.
 @li <b>Notification boxes.</b> The balloon-like notification messages, and their
 icons, should be implemented. This will be quite straightforward.
 @li <b>SIP size.</b> We need to be able to get the area taken up by the SIP (input panel),
 and the remaining area, by calling SHSipInfo. We also may need to be able to show and hide
 the SIP programmatically, with SHSipPreference. See also the <em>Input Dialogs</em> topic in
 the <em>Programming Windows CE</em> guide for more on this, and how to have dialogs
 show the SIP automatically using the WC_SIPREF control.
 @li <b>wxStaticBitmap.</b> The About box in the "Life!" demo shows a bitmap that is
 the correct size on the emulator, but too small on a VGA Pocket Loox device.
 @li <b>wxStaticLine.</b> Lines don't show up, and the documentation suggests that
 missing styles are implemented with WM_PAINT.
 @li <b>HTML control.</b> PocketPC has its own HTML control which can be used for showing
 local pages or navigating the web. We should create a version of wxHtmlWindow that uses this
 control, or have a separately-named control (wxHtmlCtrl), with a syntax as close as possible 
 to wxHtmlWindow.
 @li <b>Tooltip control.</b> PocketPC uses special TTBUTTON and TTSTATIC controls for adding
 tooltips, with the tooltip separated from the label with a double tilde. We need to support 
 this using SetToolTip.(Unfortunately it does not seem possible to dynamically remove the tooltip, 
 so an extra style may be required.)
 @li <b>Focus.</b> In the wxPropertySheetDialog demo on Smartphone, it's not possible to navigate
 between controls. The focus handling in wxWidgets needs investigation. See in particular 
 src/common/containr.cpp, and note that the default OnActivate handler in src/msw/toplevel.cpp 
 sets the focus to the first child of the dialog.
 @li <b>OK button.</b> We should allow the OK button on a dialog to be optional, perhaps
 by using wxCLOSE_BOX to indicate when the OK button should be displayed.
 @li <b>Dynamic adaptation.</b> We should probably be using run-time tests more
 than preprocessor tests, so that the same WinCE application can run on different
 versions of the operating system.
 @li <b>Modeless dialogs.</b> When a modeless dialog is hidden with the OK button, it doesn't restore the
 frame's menubar. See for example the find dialog in the dialogs sample. However, the menubar is restored
 if pressing Cancel (the window is closed). This reflects the fact that modeless dialogs are
 not very useful on Windows CE; however, we could perhaps destroy/restore a modeless dialog's menubar
 on deactivation and activation.
 @li <b>Home screen plugins.</b> Figure out how to make home screen plugins for use with wxWidgets
 applications (see http://www.codeproject.com/ce/CTodayWindow.asp for inspiration).
 Although we can't use wxWidgets to create the plugin (too large), we could perhaps write
 a generic plugin that takes registry information from a given application, with
 options to display information in a particular way using icons and text from
 a specified location.
 @li <b>Further abstraction.</b> We should be able to abstract away more of the differences
 between desktop and mobile applications, in particular for sizer layout.
 @li <b>Dialog captions.</b> The blue, bold captions on dialogs - with optional help button -
 should be catered for, either by hard-wiring the capability into all dialogs and panels,
 or by providing a standard component and sizer.


 @section page_platdetails_nativedocs Documentation for the native toolkits

 It's sometimes useful to interface directly with the underlying toolkit
 used by wxWidgets to e.g. use toolkit-specific features.
 In such case (or when you want to e.g. write a port-specific patch) it can be
 necessary to use the underlying toolkit API directly:

 @li wxMSW port uses win32 API: see MSDN docs at http://msdn2.microsoft.com/en-us/library/ms649779.aspx
 @li wxGTK port uses GTK+: see GTK+ 2.x docs at http://developer.gnome.org/doc/API/2.0/gtk/index.html

*/