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2 | <HTML> | |
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4 | <HEAD> | |
5 | <TITLE>wxWindows 2 for Windows FAQ</TITLE> | |
6 | </HEAD> | |
7 | ||
8 | <BODY BGCOLOR=#FFFFFF TEXT=#000000 VLINK="#00376A" LINK="#00529C" ALINK="#313063"> | |
9 | ||
10 | <font face="Arial, Lucida Sans, Helvetica"> | |
11 | ||
12 | <table width=100% border=0 cellpadding=3 cellspacing=0> | |
13 | <tr> | |
14 | <td bgcolor="#004080" align=left height=24 background="images/bluetitlegradient.gif"> | |
15 | <font size=+1 face="Arial, Lucida Sans, Helvetica" color="#FFFFFF"> | |
16 | <b>wxWindows 2 for Windows FAQ</b> | |
17 | </font> | |
18 | </td> | |
19 | </tr> | |
20 | </table> | |
21 | ||
22 | <P> | |
23 | ||
24 | See also <a href="faq.htm">top-level FAQ page</a>. | |
25 | <hr> | |
26 | <h3>List of questions in this category</h3> | |
27 | <ul> | |
28 | <li><a href="#platforms">Which Windows platforms are supported?</a></li> | |
29 | <li><a href="#wince">What about Windows CE?</a></li> | |
30 | <li><a href="#winxp">What do I need to do for Windows XP?</a></li> | |
31 | <li><a href="#compilers">What compilers are supported?</a></li> | |
32 | <li><a href="#bestcompiler">Which is the best compiler to use with wxWindows 2?</a></li> | |
33 | <li><a href="#unicode">Is Unicode supported?</a></li> | |
34 | <li><a href="#doublebyte">Does wxWindows support double byte fonts (Chinese/Japanese/Korean etc.)?</a></li> | |
35 | <li><a href="#dll">Can you compile wxWindows 2 as a DLL?</a></li> | |
36 | <li><a href="#exesize">How can I reduce executable size?</a></li> | |
37 | <li><a href="#mfc">Is wxWindows compatible with MFC?</a></li> | |
38 | <li><a href="#setuph">Why do I get errors about setup.h not being found?</a></li> | |
39 | <li><a href="#asuffix">Why do I get errors about FooBarA when I only use FooBar in my program?</a></li> | |
40 | <li><a href="#newerrors">Why my code fails to compile with strange errors about new operator?</a></li> | |
41 | <li><a href="#mfcport">How do I port MFC applications to wxWindows?</a></li> | |
42 | <li><a href="#crash">Why do I sometimes get bizarre crash problems using VC++ 5/6?</a></li> | |
43 | <li><a href="#makefiles">How are the wxWindows makefiles edited under Windows?</a></li> | |
44 | <li><a href="#vcdebug">How do you use VC++'s memory leak checking instead of that in wxWindows?</a></li> | |
45 | <li><a href="#shortcutproblem">Why are menu hotkeys or shortcuts not working in my application?</a></li> | |
46 | <li><a href="#regconfig">Why can I not write to the HKLM part of the registry with wxRegConfig?</a></li> | |
47 | <li><a href="#access">Is MS Active Accessibility supported?</a></li> | |
48 | </ul> | |
49 | <hr> | |
50 | ||
51 | <h3><a name="platforms">Which Windows platforms are supported?</a></h3> | |
52 | ||
53 | wxWindows 2 can be used to develop and deliver applications on Windows 3.1, Win32s, | |
54 | Windows 95, Windows 98, Windows NT, Windows 2000, and Windows XP. A Windows CE | |
55 | version is being looked into (see below).<P> | |
56 | ||
57 | wxWindows 2 is designed to make use of WIN32 features and controls. However, unlike Microsoft, | |
58 | we have not forgotten users of 16-bit Windows. Most features | |
59 | work under Windows 3.1, including wxTreeCtrl and wxListCtrl using the generic implementation. | |
60 | However, don't expect very Windows-95-specific classes to work, such as wxTaskBarIcon. The wxRegConfig | |
61 | class doesn't work either because the Windows 3.1 registry is very simplistic. Check out the 16-bit | |
62 | makefiles to see what other files have been left out. | |
63 | <P> | |
64 | 16-bit compilation is supported under Visual C++ 1.5, and Borland BC++ 4 to 5. | |
65 | <P> | |
66 | ||
67 | wxWindows 2 for Windows will also compile on Unix with gcc using Wine from <a href="http://www.winehq.org" target=_top>WineHQ</a>. | |
68 | The resulting executables are Unix binaries that work with the Wine Windows API emulator.<P> | |
69 | ||
70 | You can also compile wxWindows 2 for Windows on Unix with Cygwin or Mingw32, resulting | |
71 | in executables that will run on Windows. So in theory you could write your applications | |
72 | using wxGTK or wxMotif, then check/debug your wxWindows for Windows | |
73 | programs with Wine, and finally produce an ix86 Windows executable using Cygwin/Mingw32, | |
74 | without ever needing a copy of Microsoft Windows. See the Technical Note on the Web site detailing cross-compilation.<P> | |
75 | ||
76 | <h3><a name="wince">What about Windows CE?</a></h3> | |
77 | ||
78 | This is under consideration, though we need to get wxWindows Unicode-aware first. | |
79 | There are other interesting issues, such as how to combine the menubar and toolbar APIs | |
80 | as Windows CE requires. But there's no doubt that it will be possible, albeit | |
81 | by mostly cutting down wxWindows 2 API functionality, and adding a few classes here | |
82 | and there. Since wxWindows for 2 produces small binaries (less than 300K for | |
83 | the statically-linked 'minimal' sample), shoehorning wxWindows 2 into a Windows CE device's limited | |
84 | storage should not be a problem.<P> | |
85 | ||
86 | <h3><a name="winxp">What do I need to do for Windows XP?</a></h3> | |
87 | ||
88 | In the same directory as you have your executable (e.g. foo.exe) you | |
89 | put a file called foo.exe.manifest in which you have something like | |
90 | the following: | |
91 | ||
92 | <pre> | |
93 | <?xml version="1.0" encoding="UTF-8" standalone="yes"?> | |
94 | <assembly | |
95 | xmlns="urn:schemas-microsoft-com:asm.v1" | |
96 | manifestVersion="1.0"> | |
97 | <assemblyIdentity | |
98 | processorArchitecture="x86" | |
99 | version="5.1.0.0" | |
100 | type="win32" | |
101 | name="foo.exe"/> | |
102 | <description>Foo program</description> | |
103 | <dependency> | |
104 | <dependentAssembly> | |
105 | <assemblyIdentity | |
106 | type="win32" | |
107 | name="Microsoft.Windows.Common-Controls" | |
108 | version="6.0.0.0" | |
109 | publicKeyToken="6595b64144ccf1df" | |
110 | language="*" | |
111 | processorArchitecture="x86"/> | |
112 | </dependentAssembly> | |
113 | </dependency> | |
114 | </assembly> | |
115 | </pre> | |
116 | ||
117 | If you want to add it to your application permanently, | |
118 | you can also include it in your .rc file using this | |
119 | line:<P> | |
120 | ||
121 | <PRE> | |
122 | 1 24 "winxp.manifest" | |
123 | </PRE> | |
124 | ||
125 | In wxWindows 2.5, this will be in the wx/msw/wx.rc and | |
126 | so will happen automatically so long as you include wx.rc | |
127 | in your own .rc file.<P> | |
128 | ||
129 | For an explanation of this syntax, please see | |
130 | <a href="http://delphi.about.com/library/bluc/text/uc111601a.htm" target=_new>this | |
131 | article</a>. | |
132 | <P> | |
133 | ||
134 | <h3><a name="compilers">What compilers are supported?</a></h3> | |
135 | ||
136 | Please see the wxWindows 2 for Windows install.txt file for up-to-date information, but | |
137 | currently the following are known to work:<P> | |
138 | ||
139 | <ul> | |
140 | <li>Visual C++ 1.5, 4.0, 5.0, 6.0 | |
141 | <li>Borland C++ 4.5, 5.0 | |
142 | <li>Borland C++Builder 1.0, 3.0 | |
143 | <li>Watcom C++ 10.6 (WIN32) | |
144 | <li>Cygwin b20 | |
145 | <li>Mingw32 | |
146 | <li>MetroWerks CodeWarrior 4 | |
147 | </ul> | |
148 | <P> | |
149 | ||
150 | There is a linking problem with Symantec C++ which I hope someone can help solve. | |
151 | <P> | |
152 | ||
153 | <h3><a name="bestcompiler">Which is the best compiler to use with wxWindows 2?</a></h3> | |
154 | ||
155 | It's partly a matter of taste, but I (JACS) prefer Visual C++ since the debugger is very | |
156 | good, it's very stable, the documentation is extensive, and it generates small executables. | |
157 | Since project files are plain text, it's easy for me to generate appropriate project files | |
158 | for wxWindows samples.<P> | |
159 | ||
160 | Borland C++ is fine - and very fast - but it's hard (impossible?) to use the debugger without using project files, and | |
161 | the debugger is nowhere near up to VC++'s quality. The IDE isn't great.<P> | |
162 | ||
163 | C++Builder's power isn't really used with wxWindows since it needs integration with its | |
164 | own class library (VCL). For wxWindows, I've only used it with makefiles, in which case | |
165 | it's almost identical to BC++ 5.0 (the same makefiles can be used).<P> | |
166 | ||
167 | You can't beat Cygwin's price (free), and you can debug adequately using gdb. However, it's | |
168 | quite slow to compile since it does not use precompiled headers.<P> | |
169 | ||
170 | CodeWarrior is cross-platform - you can debug and generate Windows executables from a Mac, but not | |
171 | the other way around I think - but the IDE is, to my mind, a bit primitive.<P> | |
172 | ||
173 | Watcom C++ is a little slow and the debugger is not really up to today's standards.<P> | |
174 | ||
175 | Among the free compilers the best choice seem to be Borland C++ command line | |
176 | tools and mingw32 (port of gcc to Win32). Both of them are supported by | |
177 | wxWindows. | |
178 | ||
179 | <h3><a name="unicode">Is Unicode supported?</a></h3> | |
180 | ||
181 | Yes, Unicode is fully supported under Windows NT/2000 (Windows 9x don't | |
182 | have Unicode support anyhow). | |
183 | ||
184 | <h3><a name="doublebyte">Does wxWindows support double byte fonts (Chinese/Japanese/Korean etc.)?</a></h3> | |
185 | ||
186 | An answer from <a href="mailto:goedde@logosoft.de">Klaus Goedde</a>:<p> | |
187 | ||
188 | "For Japanese under Win2000, it seems that wxWindows has no problems to work with double byte char sets | |
189 | (I mean DBCS, that's not Unicode). First you have to install Japanese support on your Win2K system | |
190 | and choose for ANSI translation | |
191 | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls\CodePage=932 (default is 1252 for Western). | |
192 | Then you can see all the funny Japanese letters under wxWindows too.<P> | |
193 | ||
194 | In a wxTextCtrl control you have to set the window style "wxTE_RICH", otherwise this control shows the wrong | |
195 | letters. | |
196 | ||
197 | I don't now whether it works on non W2K systems, because I'm just starting using wxWindows." | |
198 | <P> | |
199 | ||
200 | <h3><a name="dll">Can you compile wxWindows 2 as a DLL?</a></h3> | |
201 | ||
202 | Yes (using the Visual C++ or Borland C++ makefile), but be aware that distributing DLLs is a thorny issue | |
203 | and you may be better off compiling statically-linked applications, unless you're | |
204 | delivering a suite of separate programs, or you're compiling a lot of wxWindows applications | |
205 | and have limited hard disk space.<P> | |
206 | ||
207 | With a DLL approach, and with different versions and configurations of wxWindows | |
208 | needing to be catered for, the end user may end up with a host of large DLLs in his or her Windows system directory, | |
209 | negating the point of using DLLs. Of course, this is not a problem just associated with | |
210 | wxWindows! | |
211 | <P> | |
212 | ||
213 | <h3><a name="exesize">How can I reduce executable size?</a></h3> | |
214 | ||
215 | You can compile wxWindows as a DLL (see above, VC++/BC++ only at present). You should also | |
216 | compile your programs for release using non-debugging and space-optimisation options, but | |
217 | take with VC++ 5/6 space optimisation: it can sometimes cause problems.<P> | |
218 | ||
219 | If you want to distribute really small executables, you can | |
220 | use <a href="http://www.un4seen.com/petite/" target=_top>Petite</a> | |
221 | by Ian Luck. This nifty utility compresses Windows executables by around 50%, so your 500KB executable | |
222 | will shrink to a mere 250KB. With this sort of size, there is reduced incentive to | |
223 | use DLLs. Another good compression tool (probably better than Petite) is <a href="http://upx.sourceforge.net/" target=_top>UPX</a>. | |
224 | <P> | |
225 | ||
226 | Please do not be surprised if MinGW produces a statically-linked minimal executable of 1 MB. Firstly, gcc | |
227 | produces larger executables than some compilers. Secondly, this figure will | |
228 | include most of the overhead of wxWindows, so as your application becomes more | |
229 | complex, the overhead becomes proportionally less significant. And thirdly, trading executable compactness | |
230 | for the enormous increase in productivity you get with wxWindows is almost always well worth it.<P> | |
231 | ||
232 | If you have a really large executable compiled with MinGW (for example 20MB) then | |
233 | you need to configure wxWindows to compile without debugging information: see | |
234 | docs/msw/install.txt for details. You may find that using configure instead | |
235 | of makefile.g95 is easier, particularly since you can maintain debug and | |
236 | release versions of the library simultaneously, in different directories. | |
237 | Also, run 'strip' after linking to remove all traces of debug info. | |
238 | <P> | |
239 | ||
240 | <H3><a name="mfc">Is wxWindows compatible with MFC?</a></H3> | |
241 | ||
242 | There is a sample which demonstrates MFC and wxWindows code co-existing in the same | |
243 | application. However, don't expect to be able to enable wxWindows windows with OLE-2 | |
244 | functionality using MFC.<P> | |
245 | ||
246 | <H3><a name="setuph">Why do I get errors about setup.h not being found?</a></H3> | |
247 | ||
248 | When you build the wxWindows library, setup.h is copied | |
249 | from include/wx/msw/setup.h to e.g. lib/mswd/wx/setup.h (the path | |
250 | depends on the configuration you're building). So you need to add | |
251 | this include path if building using the static Debug library:<P> | |
252 | ||
253 | lib/mswd<P> | |
254 | ||
255 | or if building the static Release library, lib/msw.<P> | |
256 | ||
257 | See also the <a href="http://wiki.wxwindows.org/wiki.pl?Table_Of_Contents">wxWiki Contents</a> | |
258 | for more information.<P> | |
259 | ||
260 | ||
261 | <H3><a name="asuffix">Why do I get errors about FooBarA when I only use FooBar in my program?</H3> | |
262 | ||
263 | If you get errors like | |
264 | <p> | |
265 | <center> | |
266 | <tt>no matching function for call to 'wxDC::DrawTextA(const char[5], int, | |
267 | int)'</tt> | |
268 | </center> | |
269 | <p> | |
270 | or similar ones for the other functions, i.e. the compiler error messages | |
271 | mention the function with the <tt>'A'</tt> suffix while you didn't | |
272 | use it in your code, the explanation is that you had included | |
273 | <tt><windows.h></tt> header which redefines many symbols to have such | |
274 | suffix (or <tt>'W'</tt> in the Unicode builds). | |
275 | ||
276 | <p> | |
277 | The fix is to either not include <tt><windows.h></tt> at all or include | |
278 | <tt>"wx/msw/winundef.h"</tt> immediately after it. | |
279 | ||
280 | <H3><a name="newerrors">Why my code fails to compile with strange errors about new operator?</a></H3> | |
281 | ||
282 | The most common cause of this problem is the memory debugging settings in | |
283 | <tt>wx/msw/setup.h</tt>. You have several choices: | |
284 | ||
285 | <ul> | |
286 | <li> Either disable overloading the global operator new completely by | |
287 | setting <tt>wxUSE_GLOBAL_MEMORY_OPERATORS</tt> and | |
288 | <tt>wxUSE_DEBUG_NEW_ALWAYS</tt> to 0 in this file | |
289 | <li> Or leave them on but do <tt>#undef new</tt> after including any | |
290 | wxWindows headers, like this the memory debugging will be still on | |
291 | for wxWindows sources but off for your own code | |
292 | </ul> | |
293 | ||
294 | Notice that IMHO the first solution is preferable for VC++ users who can use | |
295 | the <a href="#vcdebug">VC++ CRT memory debugging features</a> instead. | |
296 | ||
297 | <H3><a name="mfcport">How do I port MFC applications to wxWindows?</a></H3> | |
298 | ||
299 | Set up your interface from scratch using wxWindows (especially <a href="http://www.robeling.de" target=_top>wxDesigner</a> | |
300 | or <a href="http://www.anthemion.co.uk/dialogblocks/" target=_new>DialogBlocks</a> -- | |
301 | it'll save you a <i>lot</i> of time) and when you have a shell prepared, you can start | |
302 | 'pouring in' code from the MFC app, with appropriate | |
303 | modifications. This is the approach I have used, and I found | |
304 | it very satisfactory. A two-step process then - reproduce the bare | |
305 | interface first, then wire it up afterwards. That way you deal | |
306 | with each area of complexity separately. Don't try to think MFC | |
307 | and wxWindows simultaneously from the beginning - it is easier to | |
308 | reproduce the initial UI by looking at the behaviour of the MFC | |
309 | app, not its code. | |
310 | ||
311 | <H3><a name="crash">Why do I sometimes get bizarre crash problems using VC++ 5/6?</a></H3> | |
312 | ||
313 | Some crash problems can be due to inconsistent compiler | |
314 | options (and of course this isn't limited to wxWindows). | |
315 | If strange/weird/impossible things start to happen please | |
316 | check (dumping IDE project file as makefile and doing text comparison | |
317 | if necessary) that the project settings, especially the list of defined | |
318 | symbols, struct packing, etc. are exactly the same for all items in | |
319 | the project. After this, delete everything (including PCH) and recompile.<P> | |
320 | ||
321 | VC++ 5's optimization code seems to be broken and can | |
322 | cause problems: this can be seen when deleting an object Dialog | |
323 | Editor, in Release mode with optimizations on. If in doubt, | |
324 | switch off optimisations, although this will result in much | |
325 | larger executables. It seems possible that the library can be created with | |
326 | strong optimization, so long as the application is not strongly | |
327 | optimized. For example, in wxWindows project, set to 'Minimum | |
328 | Size'. In Dialog Editor project, set to 'Customize: Favor Small | |
329 | Code' (and no others). This will then work.<P> | |
330 | ||
331 | <H3><a name="makefiles">How are the wxWindows makefiles edited under Windows?</a></H3> | |
332 | ||
333 | As of wxWindows 2.1, there is a new system written by Vadim Zeitlin, that | |
334 | generates the makefiles from templates using tmake.<P> | |
335 | ||
336 | Here are Vadim's notes:<P> | |
337 | ||
338 | <blockquote> | |
339 | To use these new makefiles, you don't need anything (but see below). | |
340 | However, you should NOT modify them because these files will be | |
341 | rewritten when I regenerate them using tmake the next time. So, if | |
342 | you find a problem with any of these makefiles (say, makefile.b32) | |
343 | you'll need to modify the corresponding template (b32.t in this | |
344 | example) and regenerate the makefile using tmake.<P> | |
345 | ||
346 | tmake can be found at | |
347 | <a href="http://www.troll.no/freebies/tmake.html" target=_new>www.troll.no/freebies/tmake.html</a>. | |
348 | It's a Perl5 program and so it needs Perl (doh). There is a binary for | |
349 | Windows (available from the same page), but I haven't used it, so | |
350 | I don't know if it works as flawlessly as "perl tmake" does (note | |
351 | for people knowing Perl: don't try to run tmake with -w, it won't | |
352 | do you any good). Using it extremely simple: to regenerate makefile.b32 | |
353 | just go to distrib/msw/tmake and type<P> | |
354 | ||
355 | <pre>tmake -t b32 wxwin.pro -o ../../src/msw/makefile.b32</pre><P> | |
356 | ||
357 | The makefiles are untested - I don't have any of Borland, Watcom or | |
358 | Symantec and I don't have enough diskspace to recompile even with | |
359 | VC6 using makefiles. The new makefiles are as close as possible to the | |
360 | old ones, but not closer: in fact, there has been many strange things | |
361 | (should I say bugs?) in some of makefiles, some files were not compiled | |
362 | without any reason etc. Please test them and notify me about any problems. | |
363 | Better yet, modify the template files to generate the correct makefiles | |
364 | and check them in.<P> | |
365 | ||
366 | The templates are described in tmake ref manual (1-2 pages of text) | |
367 | and are quite simple. They do contain some Perl code, but my Perl is | |
368 | primitive (very C like) so it should be possible for anybody to make | |
369 | trivial modifications to it (I hope that only trivial modifications | |
370 | will be needed). I've tagged the ol makefiles as MAKEFILES_WITHOUT_TMAKE | |
371 | in the cvs, so you can always retrieve them and compare the new ones, | |
372 | this will make it easier to solve the problems you might have.<P> | |
373 | ||
374 | Another important file is filelist.txt: it contains the list of all | |
375 | files to be compiled. Some of them are only compiled in 16/32 bit mode. | |
376 | Some other are only compiled with some compilers (others can't compile | |
377 | them) - all this info is contained in this file.<P> | |
378 | ||
379 | So now adding a new file to wxWindows is as easy as modifying filelist.txt | |
380 | (and Makefile.ams for Unix ports) and regenerating the makefiles - no | |
381 | need to modify all files manually any more.<P> | |
382 | ||
383 | Finally, there is also a file vc6.t which I use myself: this one | |
384 | generates a project file for VC++ 6.0 (I didn't create vc5.t because | |
385 | I don't need it and can't test it, but it should be trivial to create | |
386 | one from vc6.t - probably the only things to change would be the | |
387 | version number in the very beginning and the /Z option - VC5 doesn't | |
388 | support edit-and=continue). This is not an officially supported way | |
389 | of building wxWindows (that is, nobody guarantees that it will work), | |
390 | but it has been very useful to me and I hope it will be also for | |
391 | others. To generate wxWindows.dsp run<P> | |
392 | ||
393 | <pre>tmake -t vc6 wxwin.pro -o ../../wxWindows.dsp</pre><P> | |
394 | ||
395 | Then just include this project in any workspace or open it from VC IDE | |
396 | and it will create a new workspace for you.<P> | |
397 | ||
398 | If all goes well, I'm planning to create a template file for Makefile.ams | |
399 | under src/gtk and src/motif and also replace all makefiles in the samples | |
400 | subdirectories with the project files from which all the others will be | |
401 | generated. At least it will divide the number of files in samples | |
402 | directory by 10 (and the number of files to be maintained too). | |
403 | </blockquote> | |
404 | ||
405 | <P> | |
406 | ||
407 | <H3><a name="vcdebug">How do you use VC++'s memory leak checking instead of that in wxWindows?</a></H3> | |
408 | ||
409 | Vadim Zeitlin: | |
410 | ||
411 | <pre> | |
412 | On the VC++ level, it's just the matter of calling _CrtSetDbgFlag() in the very | |
413 | beginning of the program. In wxWindows, this is done automatically when | |
414 | compiling with VC++ in debug mode unless wxUSE_GLOBAL_MEMORY_OPERATORS or | |
415 | __NO_VC_CRTDBG__ are defined - this check is done in wx/msw/msvcrt.h which | |
416 | is included from app.cpp which then calls wxCrtSetDbgFlag() without any | |
417 | ifdefs. | |
418 | ||
419 | This works quite well: at the end of the program, all leaked blocks with their | |
420 | malloc count are shown. This number (malloc count) can be used to determine | |
421 | where exactly the object was allocated: for this it's enough to set the variable | |
422 | _crtBreakAlloc (look in VC98\crt\srs\dbgheap.c line 326) to this number and | |
423 | a breakpoint will be triggered when the block with this number is allocated. | |
424 | ||
425 | For simple situations it works like a charm. For something more complicated | |
426 | like reading uninitialized memory a specialized tool is probably better... | |
427 | ||
428 | Regards, | |
429 | VZ | |
430 | </pre> | |
431 | ||
432 | <P> | |
433 | ||
434 | <H3><a name="shortcutproblem">Why are menu hotkeys or shortcuts not working in my application?</a></H3> | |
435 | ||
436 | This can happen if you have a child window intercepting EVT_CHAR events and swallowing | |
437 | all keyboard input. You should ensure that event.Skip() is called for all input that | |
438 | isn'used by the event handler.<P> | |
439 | ||
440 | It can also happen if you append the submenu to the parent | |
441 | menu {\it before} you have added your menu items. Do the append {\it after} adding | |
442 | your items, or accelerators may not be registered properly.<P> | |
443 | ||
444 | <H3><a name="#regconfig">Why can I not write to the HKLM part of the registry with wxRegConfig?</a></H3> | |
445 | ||
446 | Currently this is not possible because the wxConfig family of classes is | |
447 | supposed to deal with per-user application configuration data, and HKLM is | |
448 | only supposed to be writeable by a user with Administrator privileges. In theory, | |
449 | only installers should write to HKLM. This is still a point debated by the | |
450 | wxWindows developers. There are at least two ways to work around it if you really | |
451 | need to write to HKLM.<P> | |
452 | ||
453 | First, you can use wxRegKey directly, for example: | |
454 | ||
455 | <pre> | |
456 | wxRegKey regKey; | |
457 | ||
458 | wxString idName(wxT("HKEY_LOCAL_MACHINE\\SOFTWARE\\My Company\\My Product\\Stuff\\")); | |
459 | idName += packid; | |
460 | ||
461 | regKey.SetName(idName); | |
462 | ||
463 | { | |
464 | wxLogNull dummy; | |
465 | if (!regKey.Create()) | |
466 | { | |
467 | idName = wxT("HKEY_CURRENT_USER\\SOFTWARE\\My Company\\My Product\\Stuff\\"); | |
468 | idName += packid; | |
469 | regKey.SetName(idName); | |
470 | if (!regKey.Create()) | |
471 | return FALSE; | |
472 | } | |
473 | } | |
474 | ||
475 | if (!regKey.SetValue(wxT("THING"), (long) thing)) err += 1; | |
476 | ||
477 | regKey.Close(); | |
478 | ||
479 | </pre> | |
480 | ||
481 | Or, you can employ this trick suggested by Istvan Kovacs: | |
482 | ||
483 | <pre> | |
484 | class myGlobalConfig : public wxConfig | |
485 | { | |
486 | myGlobalConfig() : | |
487 | wxConfig ("myApp", "myCompany", "", "", wxCONFIG_USE_GLOBAL_FILE) | |
488 | {}; | |
489 | bool Write(const wxString& key, const wxString& value); | |
490 | } | |
491 | ||
492 | bool myGlobalConfig::Write (const wxString& key, const wxString& value) | |
493 | { | |
494 | wxString path = wxString ("SOFTWARE\\myCompany\\myApp\\") + wxPathOnly(key); | |
495 | wxString new_path = path.Replace ("/", "\\", true); | |
496 | wxString new_key = wxFileNameFromPath (key); | |
497 | LocalKey().SetName (wxRegKey::HKLM, path); | |
498 | return wxConfig::Write (new_key, value); | |
499 | } | |
500 | </pre> | |
501 | ||
502 | <H3><a name="#access">Is MS Active Accessibility supported?</a></H3> | |
503 | ||
504 | This is being worked on. Please see <a href="http://www.wxwindows.org/access.htm">this page</a> | |
505 | for the current status. | |
506 | ||
507 | <P> | |
508 | ||
509 | </font> | |
510 | ||
511 | </BODY> | |
512 | ||
513 | </HTML> |