C / C++ / MFC

char *pFilePath = reinterpret_cast<char*>(arg);

struct DataYouWantToPass
{
    CString AString;
    int ANumber;
};
 
// Now to pass the data.
DataYouWantToPass *pData = new DataYouWantToPass;
// Set data here.
_beginthread(ThreadRoute1, 0, reinterpret_cast<void*>(pData));
 
// As the thread function.
void ThreadRoute1( void* arg ) 
{
    DataYouWantToPass *pData = reinterpret_cast<DataYouWantToPass*>(arg);
// Blah, blah, blah...

// Bad code!!!
void ThreadRoute1( void* arg )
{
	int *pInt = reinerpret_cast<int*>(arg);
	// Use 'pInt' here...
}
 
// Call to start thread.
{
	int v = 1;
	_beginthread(ThreadRoute1, 0, reinterpret_cast<int*>(&v));
} // After this point "v" no longer exists.

void ThreadRoute1( void* arg )
{
	int *pInt = reinerpret_cast<int*>(arg);
	// Use pInt.
	delete pInt;
}
 
// Call to start thread.
int *pInt = new int(1);
if ( _beginthread(ThreadRoute1, 0, reinterpret_cast<void*>(pInt)) == -1 )
{
	delete pInt;
}

void CProj5View::OnDraw(CDC* pDC)<br />
{<br />
  	 CProj5Doc* pDoc = GetDocument();  	<br />
	 ASSERT_VALID(pDoc);<br />
	 <br />
	 CFont title;<br />
	 title.CreatePointFont(<br />
		 ((CMainFrame*)AfxGetMainWnd())->m_nFontSize, <br />
		 ((CMainFrame*)AfxGetMainWnd())->m_strFontName, <br />
		 pDC);<br />
<br />
	 CFont* oldF=pDC->SelectObject(&title);<br />
...<br />
}

Sarvan AL wrote:

if(typeid(*pView) == typeid(CMyView1) ||
typeid(*pView) == typeid(CMyView2)||
typeid(*pView) == typeid(CMyView3) )

class CBaseView : public CView
{
    // Stuff removed here...
public:
    virtual bool CanClose() const = 0;
    // Stuff removed here...
};
 
class CMyView1 : public CBaseView
{
    // Stuff removed here...
public:
    virtual bool CanClose() const
    {
       return false;
    }
    // Stuff removed here...
}; // Same for CMyView2 and CMyView3.
 
class CMyOtherViews : public CBaseView
{
    // Stuff removed here...
public:
    virtual bool CanClose() const
    {
       return true;
    }
    // Stuff removed here...
}; // Same for all "closable" views.
 
// Now to test if it can be closed:
pView->CanClose();</code>

Sarvan AL wrote:

warning C4541: 'typeid' used on polymorphic type 'class CView' with /GR-; unpredictable behavior may result

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb