Add a link to Microsoft guidelines from wxICON_QUESTION documentation.

Microsoft documentation provides explanations as to how the icons should be
used in the message dialogs which can be useful for people wondering which
icon style to use an when.

See #12417.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65465 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/interface/wx/msgdlg.h b/interface/wx/msgdlg.h
index eb8643c50a2921fd3336796bcb9d05925d8f4163..0448b043660af26faf517574552bf51f76620a09 100644 (file)
--- a/interface/wx/msgdlg.h
+++ b/interface/wx/msgdlg.h
@@ -47,8 +47,11 @@
     @style{wxICON_QUESTION}
         Displays a question mark symbol. This icon is automatically used
         with @c wxYES_NO so it's usually unnecessary to specify it explicitly.
-        This style is not supported for MSW task dialogs, as question icons do
-        not follow the guidelines. No icon will be displayed in this case.
+        This style is not supported for message dialogs under wxMSW when a task
+        dialog is used to implement them (i.e. when running under Windows Vista
+        or later) because <a href="http://msdn.microsoft.com/en-us/library/aa511273.aspx">Microsoft
+        guidelines</a> indicate that no icon should be used for routine
+        confirmations. If it is specified, no icon will be displayed.
     @style{wxICON_INFORMATION}
         Displays an information symbol. This icon is used by default if
         @c wxYES_NO is not given so it is usually unnecessary to specify it