C / C++ / MFC

<br />
extern CMyApp MyApp;<br />
<br />
/*<br />
you can see that you are referring to the main app. and that you use the public function that you've declared there in order to be able to get all the public members or methods that your shared class have.<br />
*/<br />
<br />
/*<br />
A represents one public method or member of your shared class...<br />
*/<br />
<br />
MyApp.GetThePointerToTheClassThatIWantToShareFunction()->A;<br />
<br />

// myClass.h
class MyClass
{
...
public:
  static MyClass* Instance(); // return current instance.
private:
  static std::auto_ptr<MyClass> m_pInstance;
...
}
// myClass.cpp
#include "myClass.h"

std::auto_ptr<MyClass> MyClass::m_pInstance;
MyClass* MyClass::Instance()
{
 if(m_pInstance.get() == 0)
 {
   std::auto_ptr<MyClass> tmp(new MyClass);
   m_pInstance = tmp;
 }
  return m_pInstance.get();
}
...

// somewhereElse.cpp
#include "myClass.h"

void somewhereElse::doSomething()
{
  MyClass* pMyClass = MyClass::Instance();
...
}

Max.

...
CString str;
str.Empty();
...
BYTE* pByte = (BYTE*) msg.wParam;
...
for (int n = 0; n < msg.lParam; n++)
{
    str += (char) *pByte;
    pByte++;
}
...
AfxMessageBox(str);
...