C / C++ / MFC

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

void CMainFrame::OnWaveformsummationUserdefinedgrouping()
{
    SwitchToView(ANALYSEMULWAVEFORM, 1);
}
 
void CMainFrame::OnWaveformsummationGp246()
{
    SwitchToView(ANALYSEMULWAVEFORM, 2);
}
 
void CMainFrame::OnWaveformsummationGp123()
{
    SwitchToView(ANALYSEMULWAVEFORM, 3);
}
 
void CMainFrame::OnAnalyseWaveformdiff()
{
    SwitchToView(ANALYSEMULWAVEFORM, 4);
}
 
void CMainFrame::SwitchToView(eview nView, int nOpt)
{
    ...
    pnew = (CView *) new CAnalyseMultipleWaveform(nOpt);
}

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

std::string myfunc()
{
    // allocate buffer etc...
    ...
    // get data etc...
    ...
    // ok, if pData holds a null terminate c-str
    std::string strRet = (const char*)pData;
    // finished with pData, now free it
    ...
    return strRet;
}
//
// Problem with above: To many constructor calls.
// 1) std::string strRet = (const char*)pData;
// 2) std::string str = myfunc();
// In 2 you are copying from the string returned
// by myfunc() to the string in caller and then
// the string created in myfunc() is destroyed.
//
// Better myfunc() with 1 constructor call
bool myfunc(std::string& strRet)
{
    // allocate buffer etc...
    ...
    // get data etc...
    ...
    // ok, if pData holds a null terminate c-str
    strRet = (const char*)pData;
    // finished with pData, now free it
    ...
    // if we made it here, every thing is ok
    return true;
}

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

// remove and destroy the old menu<br />
SetMenu(NULL);<br />
::DestroyMenu(m_hMenuDefault);<br />
m_hMenuDefault = NULL;<br />
<br />
// remove the title bar<br />
ModifyStyle(WS_CAPTION, 0);

// restore the title bar<br />
ModifyStyle(0, WS_CAPTION);<br />
<br />
// recreate the menu<br />
CMenu menu;<br />
<br />
menu.LoadMenu(IDR_MAINFRAME);<br />
SetMenu(&menu);<br />
m_hMenuDefault = menu.GetSafeHmenu();

char    buffer[1024] = {0};
    DWORD   dwError,
            dwNeed=0;
    HANDLE  hPrinter = 0;
    PRINTER_INFO_2  ptinfo = {0};


    if (OpenPrinter("FinePrint", &hPrinter, NULL) != FALSE)
    {
        if (GetPrinter(hPrinter, 2, (PBYTE) &ptinfo, 0, &dwNeed) != FALSE)
            GetPrinter(hPrinter, 2, (PBYTE) &ptinfo, dwNeed, &dwNeed);
        else
            dwError = GetLastError();
    }
    else
        dwError = GetLastError();

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

DWORD   dwError,
        dwNeed = 0;
HANDLE  hPrinter = 0;
PBYTE   pBuffer = NULL;
PPRINTER_INFO_2 pPrintInfo = NULL;
 
if (OpenPrinter("FinePrint", &hPrinter, NULL) != FALSE)
{
    GetPrinter(hPrinter, 2, NULL, 0, &dwNeed);
 
    pBuffer = new BYTE[dwNeed];
    if (GetPrinter(hPrinter, 2, pBuffer, dwNeed, &dwNeed) != FALSE)
    {
        pPrintInfo = (PPRINTER_INFO_2) pBuffer;
    }
 
    delete [] pBuffer;
}
else
    dwError = GetLastError(); 

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

<br />
CRect rect;<br />
rect.left = 0;<br />
rect.top = 0;<br />
//replace Width with the value of width you wrote<br />
rect.right = Width;<br />
//replace Height with the value of height you wrote<br />
rect.bottom = Height;<br />
//Call this function which converts the dialog units<br />
//into pixel units and pass it a pointer to rect<br />
MapDialogRect(&rect);<br />

if( dialogID == IDD_NORMAL )
    EndDialog(IDD_SCIENTIFIC).
else
    EndDialog(IDD_NORMAL).

...
int result = IDD_NORMAL.
do {
    if( result != IDD_NORMAL || result != IDD_SCIENTIFIC )
        break; // something happen that should not have
    { // required
        CMyDialog dlg(result);
        result = dlg.DoModal
    } // dlg destroyed here
  // FYI: IDOK = 1, IDCANCEL = 2
} while( result != IDOK && result != IDCANCEL );