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The weird thing is, that after setting the configuration to _UNICODE it still gives this error: undeclared identifier. May be it's something with the DLL?
I'dont have difficulties using this function in dialog based app, but as you can see, I do when I use it in DLL and inside a Thread.
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The answer to the question is the following line in stdafx.h
#define _WIN32_WINNT 0x400
Thank you all for your attention, time and advices  ))
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I want to call pure virtual function in constructor
of BASE class,
function will be defined in derived class.
<br />
<br />
class Derived: class Base<Derived><br />
{<br />
firtual void f()<br />
{};<br />
}<br />
<br />
template<class T><br />
class Base<br />
{<br />
Base()<br />
{<br />
f();<br />
};<br />
firtual void f() =0;<br />
<br />
};<br />
Error at link;
How to correct?
Thanks
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what error does it really give a link-time?
TOXCCT >>> GEII power
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Welcome back, Tomasz 
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Thanks, Nemanja. I was just passing by and had a look at good ol' VC board
Tomasz Sowinski -- http://www.shooltz.com
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Is there a way to change the black highlight to a different colour?
Thanks
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I have a function receiving a BSTR within an ATL project. I have placed a break point in the C++ code a added a watch to the incoming variable. When I create an instance of it within VB (don't start) to test it and pass it a directory path, I am only getting the first letter of the string that should be passed in. Any clues?
STDMETHODIMP CMoses::SetArguments(BSTR dir)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState())
::AfxMessageBox((LPCTSTR)dir, MB_OK);
CString val;
val = (LPCTSTR)dir;
::AfxMessageBox(val, MB_OK);
root.SetArguments(val);
return S_OK;
}
- Nick Parker
My Blog
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By default, strings in the Watch window use the ,s symbol. You need to use ,su for Unicode strings. So, if you have a breakpoint in the SetArguments() method, you should have dir,su in the Watch window.
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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David, thank you very much. 
- Nick Parker
My Blog
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that's very clear !!
you watch a variable that is a pointer...
what you want from this pointer is to show the string containig the caracters at th folowing addresses, until it encounters a '\0'... that is surely what happened. The second caracter of your string is very certainly a '\0'... watch this !
TOXCCT >>> GEII power
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Thank Mike, I just saw that too. The value has to be passed to a function that accepts a LPCTSTR. Should I expect any problems passing a CString to it instead (i.e.; val being of type CString)?
- Nick Parker
My Blog
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Is it ok to assign BSTR to CString under non UNICODE compilation?
MSN Messenger.
prakashnadar@msn.com
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hello!
i wrote a program to combine two wave files into one.
for that i read wave file using CFile class according to
the file format.i am reading samples into vector<int>
variables.i am combininig two vectors and writing to the
file according to the wav format.its playing as three waves.
that i mean each wave as two.
if u know to solve pls help me!
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I have a real basic question. I know this is something really easy but I am not totally sure what it means. I am learning mfc and in my book I see this:
pES = (CEditStr*)mLines.GetAt(mPosActive);
What does the (CEditStr *) mean in front of the variable? Does it have to be there?? I am not sure when I would need to use it. If anyone could explain it to me that would be great......Thanks!!!
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that code is a cast. It means that the address recorded into the pointer mLines.GetAt(mPosActive) will be interpreted as a CEditstr pointer.
If that pointer already have this type, the cast is not needed, but you can use it for your code to be "readable". Of course, if your pointer is in another type, you must explicit the cast this way...
TOXCCT >>> GEII power
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It is casting the return value of GetAt() to a CEditStr*.
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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So the GetAt functions returns a pointer of CEditStr. Perfect!
thank you everyone!! 
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If that's the case, then the cast in the code snippet you provided is redundant.
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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So when would I use casting? How would the code snippet be redundant?
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BrockVnm wrote:
So when would I use casting?
When an object needs to be coerced into acting like another type. Casting does not convert, is just represents.
BrockVnm wrote:
How would the code snippet be redundant?
The cast here is redundant since the array is holding CString* types and that's how we want to use it.
CArray< CString *, CString *> arr;
CString *p = (CString *) arr.GetAt(5); The cast here is necessary because the array is holding CWnd* types, but we want to use one of them as a CEdit* type
CArray< CWnd *, CWnd *> arr;
CEdit *p = (CEdit *) arr.GetAt(5); A simpler example might be:
double dRate = 1.997;
double d1 = (double) dRate;
int nWhole = (int) dRate;
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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