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CString variables to be used by all dailog boxes

Posted on 2002-04-07
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Last Modified: 2010-08-05
I have CString variables that I created in VC6++ for a dialog box.  and I need to use the information for that variable in another dialog box.  In C using a char string of 80 I can use the extern char to use the info anywhere in other programs.  Now I want to do the same with the CString variable but extern will not work with CString variables.  So how can I make the CString varible gobal to the whole program???
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Question by:lcrogers
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Axter earned 50 total points
ID: 6924523
>>but extern will not work with CString variables.
Extern does work with CString variables.

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by:Axter
ID: 6924526
You need to make sure that your extern is in a header (*.h) file, and that you're header file is included in the other *.cpp/*.c file in which you want to access the CString object.
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by:pagladasu
ID: 6925553
Declare the CString variable in stdafx.h
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by:Axter
ID: 6925572
>>Declare the CString variable in stdafx.h
That would not be wize.

You would end up with multiple instances of the same named CString object.
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by:Axter
ID: 6925576
You can delcare it extern in your stdafx.h, but a beter method would be to declare it extern in your main header.
Put it extern in your MyAppName.h file.
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by:christophm
ID: 6926590
1. put a (public) copy of the CString vriables in the App object.
2. Modify the DDX (if you are using DDX) by having that function copy the Dialog bound CString variables to the copies in the app object.
3. Now from anywhere (any dialog) in the app you can get the copies ::AfxGetApp()->a_CString_Copy;

Or be fancier and make the CString's in the app object the 'real' thing and not just a copy(ies).

cm
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by:griessh
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Dear lcrogers

I think you forgot this question. I will ask Community Support to close it unless you finalize it within 7 days. You can always request to keep this question open. But remember, experts can only help you if you provide feedback to their questions.
Unless there is objection or further activity,  I will suggest to accept

     "Axter"

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by:Mindphaser
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Force accepted

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