C / C++ / MFC

const Blah* GetBlah1(const Blah*& const b) {
   b = 0; // error: you cannot modify a const reference!
   return b;
}
const Blah* GetBlah2(const Blah*& b) {
   b = 0; // error: you cannot modify a reference, as it's always const!
   return b;
}
const Blah* GetBlah3(const Blah* const b) {
   b = 0; // error: you cannot modify a const pointer
   return b;
}
const Blah* GetBlah4(const Blah* b) {
   b = 0; // ok
   return b;
}
int main() {
   Blah* a = new Blah;
   Blah* b = GetBlah4(a); // this does not modify a
   assert(b==0);
   assert(a!=0);
   delete a;
   return 0;
}

Stefan_Lang wrote:

const Blah* GetBlah1(const Blah*& const b) {
   b = 0; // not an error: you're assigning a new pointer value to b which will survive once returning from the method
   return b;
}
const Blah* GetBlah2(const Blah*& b) {
   b = 0; // not an error: again you're merely assigning a new pointer to b which will survive once returning from the method
   return b;
}

Stefan_Lang wrote:

Blah* b = GetBlah4(a); // this does not modify a

const Blah* p = GetMyBlahPtr();
Blah const* p = GetMyBlahPtr();

Blah* const p = GetMyBlahPtr();

case WM_KEYDOWN:
    sprintf(szText, "repeat count = %d", lParam & 0xFF);
    MessageBox(NULL, szText, "Guess What?", MB_OK|MB_ICONQUESTION);
    return 1;

LRESULT SendMessage(

    HWND hWnd,	// handle of destination window
    UINT Msg,	// message to send
    WPARAM wParam,	// first message parameter
    LPARAM lParam 	// second message parameter
   );

symeramon wrote:

CString cQry=_T("Update urun set adi='%s' where urunid='%d'", editbo1;

symeramon wrote:

SO here is the code, could you please help me on how can I get the listbox item's id...

symeramon wrote:

But the main problem is how can I get the id from vector...

symeramon wrote:

...use it in the button click event?

BEGIN_MESSAGE_MAP(CMyDialog, CDialog)
    //{{AFX_MSG_MAP(CMyDialog)
    ON_BN_CLICKED(IDC_SOME_BUTTON, OnButtonClicked)
END_MESSAGE_MAP()
...
void CMyDialog::OnButtonClicked() 
{
    m_listbox.AddString(_T("Hello World!"));
}

Albert Holguin wrote:

basically an objected oriented layer