C / C++ / MFC

<br />
while (theApp.m_pMainWnd && PeekMessage(&msg, theApp.m_pMainWnd->m_hWnd, 0, 0, PM_NOREMOVE))<br />
{<br />
	if (!theApp.PumpMessage())<br />
	{<br />
		PostQuitMessage(0);<br />
		return TRUE;<br />
	}<br />
}<br />

LRESULT CALLBACK CBWaveCallback(
	HWND    hwnd,
	UINT    msg,
	WPARAM  wParam,
	LPARAM  lParam)
{
	CBWave *pWave = (CBWave *)::GetWindowLong(hwnd, 0);
	if (pWave)
	{
		switch(msg)
		{
			case MM_WOM_DONE:
				pWave->OnDataOut((HWAVEOUT) wParam, (WAVEHDR *) lParam);
				return 0L;

			case MM_WIM_DATA:
				pWave->OnDataIn((HWAVEIN) wParam, (WAVEHDR *) lParam);
				return 0L;
		}
	}

	return (DefWindowProc(hwnd, msg, wParam, lParam));
}

static TCHAR nameBase[]	= _T("CBWaveCallback");

HWND CBCreateWaveWindow(
	HINSTANCE hInst,
	HWND hWndParent,
	LONG waveClassThisPtr)
{
	TCHAR className[32];
	_tcscpy(className, nameBase);
	_tcscat(className, _T("Class"));

	WNDCLASS wndClass;
	if (!::GetClassInfo(hInst, className, &wndClass))
	{
		wndClass.style         = 0;
		wndClass.lpfnWndProc   = CBWaveCallback;
		wndClass.cbClsExtra    = 0;
		wndClass.cbWndExtra    = 4;
		wndClass.hInstance     = hInst;
		wndClass.hIcon         = NULL;
		wndClass.hCursor       = NULL;
		wndClass.hbrBackground = NULL;
		wndClass.lpszMenuName  = NULL;
		wndClass.lpszClassName = className;

		if (!::RegisterClass(&wndClass))
			return (HWND) 0;
	}
	TCHAR windowName[32];
	_tcscpy(windowName, nameBase);
	_tcscat(windowName, _T("Window"));

	HWND hWnd = ::CreateWindowEx(WS_EX_NOPARENTNOTIFY, className, windowName,
									hWndParent ? WS_CHILD : WS_POPUP, 0, 0, 0, 0, hWndParent, NULL, hInst,	NULL);

	::SetWindowLong(hWnd, 0, waveClassThisPtr);
	return hWnd;
}