C / C++ / MFC

BOOL CMyDlg::OnCommand(WPARAM wParam, LPARAM lParam)
{
	// TODO: Add your specialized code here and/or call the base class
	UINT notificationCode = (UINT)HIWORD(wParam);
    if (notificationCode == EN_KILLFOCUS || notificationCode == CBN_KILLFOCUS)
	{
		HWND hwnd = (HWND)lParam;
		if (hwnd == NULL)
		{
			return false;
		}
  		CWnd* pWnd = CWnd::FromHandle(hwnd);
		int nID = pWnd->GetDlgCtrlID();
		if (GetFocus() != NULL && GetFocus()->m_hWnd == pWnd->m_hWnd) // Add this
		{
			return false;
		}
		GetParent()->PostMessage(UM_KILLFOCUS, nID, 0);
	}
	return CDialog::OnCommand(wParam, lParam);
}

HWAVEIN hWaveIn = NULL;
rResult = ::waveInOpen(&hWaveIn, WAVE_MAPPER, &pcmWaveFormat, 0, 0, CALLBACK_NULL);

/*static*/ int theClass::theFunctionCaller(theClass * obj, int theParam1)
{
    if (obj != NULL)
        obj->theFunction(theParam1);
}

bool globFunction (theClass * obj, funcPtr  aFunction)
{
    int anArg = 0;
    int ret = aFunction(obj, anArg);
    return true;
}

int theClass::anotherFunction(void)
{
    globFunction (this, &theClass::theFunctionCaller, true);
}

error C2352: 'theClass::theFunction' : illegal call of non-static member function

namespace wrapper {
   class theClass* instance; // global variable required!
   int theClassWrapper(int arg) {
      int ret = 0;
      if (instance != nullptr)
         ret = instance->theFunction(arg);
      return ret;
   }
};
int theClass::anotherFunction() {
   wrapper::instance = this;
   return globFunction(&wrapper::theClassWrapper, true);
}

Freak30 wrote:

If I remember correctly, you can't declare a pointer to a non-static member function in native C++

#include<iostream>
using namespace std;

class A
{
  int i;
public:
  A(int i):i(i){}
  void show() { cout << i << endl;}
};

void  (A::*pmfn)();

int main()
{
  A  a(7);

  pmfn = &A::show;

  (a.*pmfn)();
}