C / C++ / MFC

borono wrote:

am sorry, but I do not know what you meant by: "...set the memory and zero it. When you come to use it later simply test it." Can I see an example?

unsgined char *foo; // declare the variable
foo = new unsigned char [100]; // set the memory so it can hold 100 chars
ZeroMemory(foo,sizeof foo); // set the memory to all 0's

int size = strlen((char *)foo); // notice the typecast.  
// strlen is expecting a char* where'as we have an unsigned char*.

// now give it a value
strcpy((char *)foo,"Some random string"); // try copying something to it

// now test
if (!foo)
    MessageBox(0,"foo is still empty",0,0);

delete foo; // prevent memory leaking

waldermort wrote:

Watch the values of i at this point.

"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

borono wrote:

could that be the reason.

fprintf(out, "%.2x", 123);

"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

borono wrote:

Good idea and I tried that just now and it still failed...

"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

"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

"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

"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

<br />
class CCustomButton : public CButton<br />
{<br />
private:<br />
	DECLARE_MESSAGE_MAP ()<br />
};<br />
<br />
<br />
BEGIN_MESSAGE_MAP(CCustomButton, CDialog)<br />
<br />
END_MESSAGE_MAP()<br />

<br />
mainAppDlg.cpp(106): error C2248: 'CDialog::GetThisMessageMap' : cannot access protected member declared in class 'CDialog'<br />
        c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\afxwin.h(2864) : see declaration of 'CDialog::GetThisMessageMap'<br />
        c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\afxwin.h(2767) : see declaration of 'CDialog'<br />

Rostfrei wrote:

I already tried that but it is not possible to declare message map in there

Rostfrei wrote:

class CCustomButton : public CButton
...
BEGIN_MESSAGE_MAP(CCustomButton, CDialog)

"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