fix for wxFrame parent which somehow wasn't committed yesterday

[wxWidgets.git] / docs / html / faqmsw.htm

diff --git a/docs/html/faqmsw.htm b/docs/html/faqmsw.htm
index 085980f7b77e0f59762af4fd93cf659e5f957bf9..be0f8d909149dbb1fbeda5712b782a9832cbbe66 100644 (file)
--- a/docs/html/faqmsw.htm
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@@ -8,10 +8,10 @@
 
 <font face="Arial, Lucida Sans, Helvetica">
 
-<table width=100% border=4 cellpadding=5 cellspacing=0>
+<table width=100% border=0 cellpadding=5 cellspacing=0>
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-<td bgcolor="#660000">
-<font size=+1 face="Arial, Lucida Sans, Helvetica" color="#FFFFFF">
+<td bgcolor="#C4ECF9">
+<font size=+1 face="Arial, Lucida Sans, Helvetica" color="#000000">
 wxWindows 2 for Windows FAQ
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@@ -240,6 +240,34 @@ generated. At least it will divide the number of files in samples
 directory by 10 (and the number of files to be maintained too).
 </blockquote>
 
+<P>
+
+<H3>How do you use VC++'s memory leak checking instead of that in wxWindows?</H3>
+
+Vadim Zeitlin:
+
+<pre>
+On the VC++ level, it's just the matter of calling _CrtSetDbgFlag() in the very
+beginning of the program. In wxWindows, this is done automatically when
+compiling with VC++ in debug mode unless wxUSE_GLOBAL_MEMORY_OPERATORS or
+__NO_VC_CRTDBG__ are defined - this check is done in wx/msw/msvcrt.h which
+is included from app.cpp which then calls wxCrtSetDbgFlag() without any
+#ifdefs.
+
+This works quite well: at the end of the program, all leaked blocks with their
+malloc count are shown. This number (malloc count) can be used to determine
+where exactly the object was allocated: for this it's enough to set the variable
+_crtBreakAlloc (look in VC98\crt\srs\dbgheap.c line 326) to this number and
+a breakpoint will be triggered when the block with this number is allocated.
+
+For simple situations it works like a charm. For something more complicated
+like reading uninitialized memory a specialized tool is probably better...
+
+Regards,
+VZ
+</pre>
+
+
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