silence gcc warnings about values not handled in switch

[wxWidgets.git] / docs / latex / wx / body.tex

diff --git a/docs/latex/wx/body.tex b/docs/latex/wx/body.tex
index a7d2c80d384baff41040d7819cb54e789e1df65a..aa983ac36120a4a1132cd5d9f4359aec31113d2f 100644 (file)
--- a/docs/latex/wx/body.tex
+++ b/docs/latex/wx/body.tex
@@ -3,7 +3,7 @@
 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
 \setfooter{\thepage}{}{}{}{}{\thepage}%
 
 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
 \setfooter{\thepage}{}{}{}{}{\thepage}%
 

-\section{What is wxWidgets?}
+\section{What is wxWidgets?}\label{whatis}

 
 wxWidgets is a C++ framework providing GUI (Graphical User
 Interface) and other facilities on more than one platform.  Version 2 currently
 
 wxWidgets is a C++ framework providing GUI (Graphical User
 Interface) and other facilities on more than one platform.  Version 2 currently


@@ -23,7 +23,7 @@ Please note that in the following, ``MS Windows" often refers to all
 platforms related to Microsoft Windows, including 16-bit and 32-bit
 variants, unless otherwise stated. All trademarks are acknowledged.
 
 platforms related to Microsoft Windows, including 16-bit and 32-bit
 variants, unless otherwise stated. All trademarks are acknowledged.
 

-\section{Why another cross-platform development tool?}
+\section{Why another cross-platform development tool?}\label{why}

 
 wxWidgets was developed to provide a cheap and flexible way to maximize
 investment in GUI application development.  While a number of commercial
 
 wxWidgets was developed to provide a cheap and flexible way to maximize
 investment in GUI application development.  While a number of commercial


@@ -141,11 +141,13 @@ To make use of wxWidgets, you currently need one of the following setups.
 (a) MS-Windows:
 
 \begin{enumerate}\itemsep=0pt
 (a) MS-Windows:
 
 \begin{enumerate}\itemsep=0pt

-\item A 486 or higher PC running MS Windows.
-\item A Windows compiler: most are supported, but please see {\tt install.txt} for
-details. Supported compilers include Microsoft Visual C++ 4.0 or higher, Borland C++, Cygwin,
-MinGW, Metrowerks CodeWarrior.
-\item At least 60 MB of disk space.
+\item A 32-bit or 64-bit PC running MS Windows.
+\item A Windows compiler: MS Visual C++ (embedded Visual C++ for wxWinCE
+port), Borland C++, Watcom C++, Cygwin, MinGW, Metrowerks CodeWarrior,
+Digital Mars C++. See {\tt install.txt} for details about compiler 
+version supported.
+\item At least 100 MB of disk space for source tree and additional space for 
+libraries and application building (depends on compiler and build settings).

 \end{enumerate}
 
 (b) Unix:
 \end{enumerate}
 
 (b) Unix:


@@ -154,7 +156,8 @@ MinGW, Metrowerks CodeWarrior.
 \item Almost any C++ compiler, including GNU C++ (EGCS 1.1.1 or above).
 \item Almost any Unix workstation, and one of: GTK+ 1.2, GTK+ 2.0, Motif 1.2 or higher, Lesstif.
 If using the wxX11 port, no such widget set is required.
 \item Almost any C++ compiler, including GNU C++ (EGCS 1.1.1 or above).
 \item Almost any Unix workstation, and one of: GTK+ 1.2, GTK+ 2.0, Motif 1.2 or higher, Lesstif.
 If using the wxX11 port, no such widget set is required.

-\item At least 60 MB of disk space.
+\item At least 100 MB of disk space for source tree and additional space for 
+libraries and application building (depends on compiler and build settings).

 \end{enumerate}
 
 (c) Mac OS/Mac OS X:
 \end{enumerate}
 
 (c) Mac OS/Mac OS X:


@@ -162,11 +165,12 @@ If using the wxX11 port, no such widget set is required.
 \begin{enumerate}\itemsep=0pt
 \item A PowerPC Mac running Mac OS 8.6/9.x (eg. Classic) or Mac OS X 10.x.
 \item CodeWarrior 5.3, 6 or 7 for Classic Mac OS.
 \begin{enumerate}\itemsep=0pt
 \item A PowerPC Mac running Mac OS 8.6/9.x (eg. Classic) or Mac OS X 10.x.
 \item CodeWarrior 5.3, 6 or 7 for Classic Mac OS.

-\item The Apple Developer Tools (eg. GNU C++) or CodeWarrior 7 for Mac OS X.
-\item At least 60 MB of disk space.
+\item The Apple Developer Tools (eg. GNU C++), CodeWarrior 7 or above for Mac OS X.
+\item At least 100 MB of disk space for source tree and additional space for 
+libraries and application building (depends on compiler and build settings).

 \end{enumerate}
 
 \end{enumerate}
 

-\section{Availability and location of wxWidgets}
+\section{Availability and location of wxWidgets}\label{where}

 
 \winhelponly{wxWidgets is available by anonymous FTP and World Wide Web
 from ftp://biolpc22.york.ac.uk/pub and/or http://www.wxwidgets.org.}
 
 \winhelponly{wxWidgets is available by anonymous FTP and World Wide Web
 from ftp://biolpc22.york.ac.uk/pub and/or http://www.wxwidgets.org.}


@@ -176,7 +180,7 @@ and/or \urlref{http://www.wxwidgets.org}{http://www.wxwidgets.org}.}
 
 You can also buy a CD-ROM using the form on the Web site.
 
 
 You can also buy a CD-ROM using the form on the Web site.
 

-\section{Acknowledgements}
+\section{Acknowledgements}\label{acknowledgements}

 
 Thanks are due to AIAI for being willing to release the original version of
 wxWidgets into the public domain, and to our patient partners.
 
 Thanks are due to AIAI for being willing to release the original version of
 wxWidgets into the public domain, and to our patient partners.


@@ -184,14 +188,26 @@ wxWidgets into the public domain, and to our patient partners.
 We would particularly like to thank the following for their contributions to wxWidgets, and the many others who have been involved in
 the project over the years. Apologies for any unintentional omissions from this list. 
  
 We would particularly like to thank the following for their contributions to wxWidgets, and the many others who have been involved in
 the project over the years. Apologies for any unintentional omissions from this list. 
  

-Yiorgos Adamopoulos, Jamshid Afshar, Alejandro Aguilar-Sierra, AIAI, Patrick Albert, Karsten Ballueder, Michael Bedward, Kai Bendorf, Yura Bidus, Keith 
-Gary Boyce, Chris Breeze, Pete Britton, Ian Brown, C. Buckley, Dmitri Chubraev, Robin Corbet, Cecil Coupe, Andrew Davison, Neil Dudman, Robin 
-Dunn, Hermann Dunkel, Jos van Eijndhoven, Tom Felici, Thomas Fettig, Matthew Flatt, Pasquale Foggia, Josep Fortiana, Todd Fries, Dominic Gallagher, 
-Guillermo Rodriguez Garcia, Wolfram Gloger, Norbert Grotz, Stefan Gunter, Bill Hale, Patrick Halke, Stefan Hammes, Guillaume Helle, Harco de Hilster, Cord Hockemeyer, Markus 
-Holzem, Olaf Klein, Leif Jensen, Bart Jourquin, Guilhem Lavaux, Jan Lessner, Nicholas Liebmann, Torsten Liermann, Per Lindqvist, Thomas Runge, Tatu
-M\"{a}nnist\"{o}, Scott Maxwell, Thomas Myers, Oliver Niedung, Stefan Neis, Hernan Otero, Ian Perrigo, Timothy Peters, Giordano Pezzoli, Harri Pasanen, Thomaso Paoletti, 
-Garrett Potts, Marcel Rasche, Robert Roebling, Dino Scaringella, Jobst Schmalenbach, Arthur Seaton, Paul Shirley, Vaclav Slavik, Stein Somers, Petr Smilauer, Neil Smith, 
-Kari Syst\"{a}, Arthur Tetzlaff-Deas, Jonathan Tonberg, Jyrki Tuomi, David Webster, Janos Vegh, Andrea Venturoli, Vadim Zeitlin, Xiaokun Zhu, Edward Zimmermann.
+Yiorgos Adamopoulos, Jamshid Afshar, Alejandro Aguilar-Sierra, AIAI, 
+Patrick Albert, Karsten Ballueder, Mattia Barbon, Michael Bedward, 
+Kai Bendorf, Yura Bidus, Keith Gary Boyce, Chris Breeze, Pete Britton, 
+Ian Brown, C. Buckley, Marco Cavallini, Dmitri Chubraev, Robin Corbet, Cecil Coupe, 
+Stefan Csomor, Andrew Davison, Gilles Depeyrot, Neil Dudman, Robin Dunn, 
+Hermann Dunkel, Jos van Eijndhoven, Chris Elliott, David Elliott, Tom Felici, 
+Thomas Fettig, Matthew Flatt, Pasquale Foggia, Josep Fortiana, Todd Fries, 
+Dominic Gallagher, Guillermo Rodriguez Garcia, Wolfram Gloger, Norbert Grotz, 
+Stefan Gunter, Bill Hale, Patrick Halke, Stefan Hammes, Guillaume Helle, 
+Harco de Hilster, Kevin Hock, Cord Hockemeyer, Markus Holzem, Olaf Klein, Leif Jensen, 
+Bart Jourquin, Guilhem Lavaux, Ron Lee, Jan Lessner, Nicholas Liebmann, 
+Torsten Liermann, Per Lindqvist, Thomas Runge, Tatu M\"{a}nnist\"{o}, 
+Scott Maxwell, Thomas Myers, Oliver Niedung, Stefan Neis, Ryan Norton, Hernan Otero, 
+Ian Perrigo, Timothy Peters, Giordano Pezzoli, Harri Pasanen, Thomaso Paoletti, 
+Garrett Potts, Marcel Rasche, Robert Roebling, Dino Scaringella, 
+Jobst Schmalenbach, Arthur Seaton, Paul Shirley, Wlodzimierz `ABX' Skiba, 
+Vaclav Slavik, Julian Smart, Stein Somers, Petr Smilauer, Neil Smith, 
+Kari Syst\"{a}, George Tasker, Arthur Tetzlaff-Deas, Jonathan Tonberg, 
+Jyrki Tuomi, Janos Vegh, Andrea Venturoli, David Webster, Otto Wyss, 
+Vadim Zeitlin, Xiaokun Zhu, Edward Zimmermann.

 
 `Graphplace', the basis for the wxGraphLayout library, is copyright Dr. Jos
 T.J. van Eijndhoven of Eindhoven University of Technology. The code has
 
 `Graphplace', the basis for the wxGraphLayout library, is copyright Dr. Jos
 T.J. van Eijndhoven of Eindhoven University of Technology. The code has


@@ -220,7 +236,7 @@ This chapter describes the practical details of using wxWidgets. Please
 see the file install.txt for up-to-date installation instructions, and
 changes.txt for differences between versions.
 
 see the file install.txt for up-to-date installation instructions, and
 changes.txt for differences between versions.
 

-\section{Include files}
+\section{Include files}\label{includefiles}

 
 The main include file is {\tt "wx/wx.h"}; this includes the most commonly
 used modules of wxWidgets.
 
 The main include file is {\tt "wx/wx.h"}; this includes the most commonly
 used modules of wxWidgets.


@@ -247,25 +263,21 @@ the following section before any other includes:
 
 The file {\tt "wx/wxprec.h"} includes {\tt "wx/wx.h"}. Although this incantation
 may seem quirky, it is in fact the end result of a lot of experimentation,
 
 The file {\tt "wx/wxprec.h"} includes {\tt "wx/wx.h"}. Although this incantation
 may seem quirky, it is in fact the end result of a lot of experimentation,

-and several Windows compilers to use precompilation (those tested are Microsoft Visual C++, Borland C++
-and Watcom C++).
+and several Windows compilers to use precompilation which is largely automatic for
+compilers with necessary support. Currently it is used for Visual C++ (including
+embedded Visual C++), Borland C++, Open Watcom C++, Digital Mars C++
+and newer versions of GCC.
+Some compilers might need extra work from the application developer to set the
+build environment up as necessary for the support.

 
 

-Borland precompilation is largely automatic. Visual C++ requires specification of {\tt "wx/wxprec.h"} as
-the file to use for precompilation. Watcom C++ is automatic apart from the specification of
-the .pch file. Watcom C++ is strange in requiring the precompiled header to be used only for
-object files compiled in the same directory as that in which the precompiled header was created.
-Therefore, the wxWidgets Watcom C++ makefiles go through hoops deleting and recreating
-a single precompiled header file for each module, thus preventing an accumulation of many
-multi-megabyte .pch files.
-
-\section{Libraries}
+\section{Libraries}\label{libraries}

 
 Most ports of wxWidgets can create either a static library or a shared
 library. wxWidgets can also be built in multilib and monolithic variants.
 See the \helpref{libraries list}{librarieslist} for more
 information on these.
 
 
 Most ports of wxWidgets can create either a static library or a shared
 library. wxWidgets can also be built in multilib and monolithic variants.
 See the \helpref{libraries list}{librarieslist} for more
 information on these.
 

-\section{Configuration}
+\section{Configuration}\label{configuration}

 
 When using project files and makefiles directly to build wxWidgets,
 options are configurable in the file
 
 When using project files and makefiles directly to build wxWidgets,
 options are configurable in the file


@@ -280,7 +292,7 @@ along with suitable makefiles. When using the RPM packages
 for installing wxWidgets on Linux, a correct setup.h is shipped in the package and
 this must not be changed.
 
 for installing wxWidgets on Linux, a correct setup.h is shipped in the package and
 this must not be changed.
 

-\section{Makefiles}
+\section{Makefiles}\label{makefiles}

 
 On Microsoft Windows, wxWidgets has a different set of makefiles for each
 compiler, because each compiler's 'make' tool is slightly different.
 
 On Microsoft Windows, wxWidgets has a different set of makefiles for each
 compiler, because each compiler's 'make' tool is slightly different.


@@ -311,10 +323,10 @@ For details on using makefiles, configure, and project files,
 please see docs/xxx/install.txt in your distribution, where
 xxx is the platform of interest, such as msw, gtk, x11, mac.
 
 please see docs/xxx/install.txt in your distribution, where
 xxx is the platform of interest, such as msw, gtk, x11, mac.
 

-\section{Windows-specific files}
+\section{Windows-specific files}\label{windowsfiles}

 
 

-wxWidgets application compilation under MS Windows requires at least two
-extra files, resource and module definition files.
+wxWidgets application compilation under MS Windows requires at least one
+extra file: a resource file.

 
 \subsection{Resource file}\label{resources}
 
 
 \subsection{Resource file}\label{resources}
 


@@ -339,7 +351,7 @@ the MS Windows SDK documentation.
 so programs that search your executable for icons (such
 as the Program Manager) find your application icon first.}
 
 so programs that search your executable for icons (such
 as the Program Manager) find your application icon first.}
 

-\section{Allocating and deleting wxWidgets objects}
+\section{Allocating and deleting wxWidgets objects}\label{allocatingobjects}

 
 In general, classes derived from wxWindow must dynamically allocated
 with {\it new} and deleted with {\it delete}. If you delete a window,
 
 In general, classes derived from wxWindow must dynamically allocated
 with {\it new} and deleted with {\it delete}. If you delete a window,


@@ -369,7 +381,7 @@ make calls like wxDC::SetPen(wxNullPen) or wxDC::SelectObject(wxNullBitmap) befo
 a drawing object that may be in use. Code that doesn't do this will probably work
 fine on some platforms, and then fail under Windows.
 
 a drawing object that may be in use. Code that doesn't do this will probably work
 fine on some platforms, and then fail under Windows.
 

-\section{Architecture dependency}
+\section{Architecture dependency}\label{architecturedependency}

 
 A problem which sometimes arises from writing multi-platform programs is that
 the basic C types are not defined the same on all platforms. This holds true
 
 A problem which sometimes arises from writing multi-platform programs is that
 the basic C types are not defined the same on all platforms. This holds true


@@ -389,7 +401,7 @@ as well).
 The macros handling bit-swapping with respect to the applications endianness
 are described in the \helpref{Byte order macros}{byteordermacros} section.
 
 The macros handling bit-swapping with respect to the applications endianness
 are described in the \helpref{Byte order macros}{byteordermacros} section.
 

-\section{Conditional compilation}
+\section{Conditional compilation}\label{conditionalcompilation}

 
 One of the purposes of wxWidgets is to reduce the need for conditional
 compilation in source code, which can be messy and confusing to follow.
 
 One of the purposes of wxWidgets is to reduce the need for conditional
 compilation in source code, which can be messy and confusing to follow.


@@ -398,21 +410,21 @@ features (such as metafile use under MS Windows). The symbols
 listed in the file {\tt symbols.txt} may be used for this purpose,
 along with any user-supplied ones.
 
 listed in the file {\tt symbols.txt} may be used for this purpose,
 along with any user-supplied ones.
 

-\section{C++ issues}
+\section{C++ issues}\label{cpp}

 
 The following documents some miscellaneous C++ issues.
 
 
 The following documents some miscellaneous C++ issues.
 

-\subsection{Templates}
+\subsection{Templates}\label{templates}

 
 wxWidgets does not use templates (except for some advanced features that
 are switched off by default) since it is a notoriously unportable feature.
 
 
 wxWidgets does not use templates (except for some advanced features that
 are switched off by default) since it is a notoriously unportable feature.
 

-\subsection{RTTI}
+\subsection{RTTI}\label{rtti}

 
 wxWidgets does not use C++ run-time type information since wxWidgets provides
 its own run-time type information system, implemented using macros.
 
 
 wxWidgets does not use C++ run-time type information since wxWidgets provides
 its own run-time type information system, implemented using macros.
 

-\subsection{Type of NULL}
+\subsection{Type of NULL}\label{null}

 
 Some compilers (e.g. the native IRIX cc) define NULL to be 0L so that
 no conversion to pointers is allowed. Because of that, all these
 
 Some compilers (e.g. the native IRIX cc) define NULL to be 0L so that
 no conversion to pointers is allowed. Because of that, all these


@@ -428,7 +440,7 @@ as
 It is recommended to adhere to this in all code using wxWidgets as
 this make the code (a bit) more portable.
 
 It is recommended to adhere to this in all code using wxWidgets as
 this make the code (a bit) more portable.
 

-\subsection{Precompiled headers}
+\subsection{Precompiled headers}\label{precompiledheaders}

 
 Some compilers, such as Borland C++ and Microsoft C++, support
 precompiled headers. This can save a great deal of compiling time. The
 
 Some compilers, such as Borland C++ and Microsoft C++, support
 precompiled headers. This can save a great deal of compiling time. The


@@ -454,7 +466,7 @@ the optimal compilation for each compiler, although it is
 biased towards the precompiled headers facility available
 in Microsoft C++.
 
 biased towards the precompiled headers facility available
 in Microsoft C++.
 

-\section{File handling}
+\section{File handling}\label{filehandling}

 
 When building an application which may be used under different
 environments, one difficulty is coping with documents which may be
 
 When building an application which may be used under different
 environments, one difficulty is coping with documents which may be


@@ -534,8 +546,8 @@ development can be done. The program can be found in {\tt utils/configtool}.
 \item[{\bf XRC resource system}]
 This is the sizer-aware resource system, and uses
 XML-based resource specifications that can be generated by tools
 \item[{\bf XRC resource system}]
 This is the sizer-aware resource system, and uses
 XML-based resource specifications that can be generated by tools

-such as \urlref{wxDesigner}{http://www.roebling.de} and XRC's own wxrcedit.
-You can find this in {\tt contrib/src/xrc}, {\tt contrib/include/wx/xrc}, {\tt contrib/samples/xrc}, and {\tt contrib/utils/wxrcedit}.
+such as \urlref{wxDesigner}{http://www.roebling.de}.
+You can find this in {\tt src/xrc}, {\tt include/wx/xrc}, {\tt samples/xrc}.

 For more information, see the \helpref{XML-based resource system overview}{xrcoverview}.
 \item[{\bf Object Graphics Library}]
 OGL defines an API for applications that need to display objects connected by lines.
 For more information, see the \helpref{XML-based resource system overview}{xrcoverview}.
 \item[{\bf Object Graphics Library}]
 OGL defines an API for applications that need to display objects connected by lines.


@@ -575,9 +587,9 @@ This chapter is intended to list strategies that may be useful when
 writing and debugging wxWidgets programs. If you have any good tips,
 please submit them for inclusion here.
 
 writing and debugging wxWidgets programs. If you have any good tips,
 please submit them for inclusion here.
 

-\section{Strategies for reducing programming errors}
+\section{Strategies for reducing programming errors}\label{reducingerrors}

 
 

-\subsection{Use ASSERT}
+\subsection{Use ASSERT}\label{useassert}

 
 Although I haven't done this myself within wxWidgets, it is good
 practice to use ASSERT statements liberally, that check for conditions that
 
 Although I haven't done this myself within wxWidgets, it is good
 practice to use ASSERT statements liberally, that check for conditions that


@@ -586,7 +598,7 @@ These can be compiled out of a non-debugging version of wxWidgets
 and your application. Using ASSERT is an example of `defensive programming':
 it can alert you to problems later on.
 
 and your application. Using ASSERT is an example of `defensive programming':
 it can alert you to problems later on.
 

-\subsection{Use wxString in preference to character arrays}
+\subsection{Use wxString in preference to character arrays}\label{usewxstring}

 
 Using wxString can be much safer and more convenient than using char *.
 Again, I haven't practiced what I'm preaching, but I'm now trying to use
 
 Using wxString can be much safer and more convenient than using char *.
 Again, I haven't practiced what I'm preaching, but I'm now trying to use


@@ -598,9 +610,9 @@ manipulation (which means less code).
 
 The same goes for other data types: use classes wherever possible.
 
 
 The same goes for other data types: use classes wherever possible.
 

-\section{Strategies for portability}
+\section{Strategies for portability}\label{portability}

 
 

-\subsection{Use relative positioning or constraints}
+\subsection{Use relative positioning or constraints}\label{userelativepositioning}

 
 Don't use absolute panel item positioning if you can avoid it. Different GUIs have
 very differently sized panel items. Consider using the constraint system, although this
 
 Don't use absolute panel item positioning if you can avoid it. Different GUIs have
 very differently sized panel items. Consider using the constraint system, although this


@@ -610,14 +622,14 @@ Alternatively, you could use alternative .wrc (wxWidgets resource files) on diff
 platforms, with slightly different dimensions in each. Or space your panel items out
 to avoid problems.
 
 platforms, with slightly different dimensions in each. Or space your panel items out
 to avoid problems.
 

-\subsection{Use wxWidgets resource files}
+\subsection{Use wxWidgets resource files}\label{useresources}

 
 Use .xrc (wxWidgets resource files) where possible, because they can be easily changed
 independently of source code.
 
 \section{Strategies for debugging}\label{debugstrategies}
 
 
 Use .xrc (wxWidgets resource files) where possible, because they can be easily changed
 independently of source code.
 
 \section{Strategies for debugging}\label{debugstrategies}
 

-\subsection{Positive thinking}
+\subsection{Positive thinking}\label{positivethinking}

 
 It is common to blow up the problem in one's imagination, so that it seems to threaten
 weeks, months or even years of work. The problem you face may seem insurmountable:
 
 It is common to blow up the problem in one's imagination, so that it seems to threaten
 weeks, months or even years of work. The problem you face may seem insurmountable:


@@ -631,7 +643,7 @@ you will probably wonder why you worried so much. That's not to say it
 isn't painful at the time. Try not to worry -- there are many more important
 things in life.
 
 isn't painful at the time. Try not to worry -- there are many more important
 things in life.
 

-\subsection{Simplify the problem}
+\subsection{Simplify the problem}\label{simplifyproblem}

 
 Reduce the code exhibiting the problem to the smallest program possible
 that exhibits the problem. If it is not possible to reduce a large and
 
 Reduce the code exhibiting the problem to the smallest program possible
 that exhibits the problem. If it is not possible to reduce a large and


@@ -644,14 +656,14 @@ to go from functioning to non-functioning state. This should give a clue
 to the problem. In some cases though, such as memory leaks or wrong
 deallocation, this can still give totally spurious results!
 
 to the problem. In some cases though, such as memory leaks or wrong
 deallocation, this can still give totally spurious results!
 

-\subsection{Use a debugger}
+\subsection{Use a debugger}\label{usedebugger}

 
 This sounds like facetious advice, but it is surprising how often people
 don't use a debugger. Often it is an overhead to install or learn how to
 use a debugger, but it really is essential for anything but the most
 trivial programs.
 
 
 This sounds like facetious advice, but it is surprising how often people
 don't use a debugger. Often it is an overhead to install or learn how to
 use a debugger, but it really is essential for anything but the most
 trivial programs.
 

-\subsection{Use logging functions}
+\subsection{Use logging functions}\label{uselogging}

 
 There is a variety of logging functions that you can use in your program:
 see \helpref{Logging functions}{logfunctions}.
 
 There is a variety of logging functions that you can use in your program:
 see \helpref{Logging functions}{logfunctions}.


@@ -660,7 +672,7 @@ Using tracing statements may be more convenient than using the debugger
 in some circumstances (such as when your debugger doesn't support a lot
 of debugging code, or you wish to print a bunch of variables).
 
 in some circumstances (such as when your debugger doesn't support a lot
 of debugging code, or you wish to print a bunch of variables).
 

-\subsection{Use the wxWidgets debugging facilities}
+\subsection{Use the wxWidgets debugging facilities}\label{usedebuggingfacilities}

 
 You can use wxDebugContext to check for
 memory leaks and corrupt memory: in fact in debugging mode, wxWidgets will
 
 You can use wxDebugContext to check for
 memory leaks and corrupt memory: in fact in debugging mode, wxWidgets will