C++ CComboBox::GetLBTextLen方法代码示例

int FindReplDlg::GetFindText(CComboBox& wnd, bsString& text)
{
	int len;
	char *tp;
	int sel = wnd.GetCurSel();
	if (sel == -1)
	{
		len = wnd.GetWindowTextLength()+1;
		tp = new char[len];
		wnd.GetWindowText(tp, len);
		sel = wnd.FindStringExact(-1, tp);
		if (sel == -1)
		{
			sel = wnd.InsertString(0, tp);
			wnd.SetCurSel(sel);
		}
		int cnt;
		while ((cnt = wnd.GetCount()) >= 20)
			wnd.DeleteString(cnt-1);
	}
	else
	{
		len = wnd.GetLBTextLen(sel)+1;
		tp = new char[len];
		wnd.GetLBText(sel, tp);
	}
	text.Attach(tp);
	return sel;
}

void CPriorityTag::OnButtonSelectprioritytagOk() 
{
	// TODO: Add your control notification handler code here
	GAL_ERROR hError;

	ptrArm_UI_Update_Priority->priority_tag = m_cbPriorityTag.GetItemData(m_cbPriorityTag.GetCurSel());

	if ((proc_obj_arm_ui_update_priority(m_lpAccountData->GetHandle(),ptrArm_UI_Update_Priority, &hError)) == GAL_SUCCESS) {
				
		CComboBox *pmyPriorityItemComboBox =  (CComboBox *)GetDlgItem(IDC_COMBO_SELECTPRIORITYTAG_PRIORITYTAG_VALUE);
		for (int i=0;i < pmyPriorityItemComboBox->GetCount();i++) {
			if ((int)(pmyPriorityItemComboBox->GetItemData(i)) == ptrArm_UI_Update_Priority->priority_tag)   {
				CString combotext;
				int n = pmyPriorityItemComboBox->GetLBTextLen( i );
				pmyPriorityItemComboBox->GetLBText( i, combotext.GetBuffer(n) );      
				strcpy(cellvalue,combotext);
				combotext.ReleaseBuffer();
			}
		}
	}

	CDialog::OnOK();
}

void CVisualPage::OnCamSetupButton()
{
  CComboBox * box = (CComboBox*)(GetDlgItem(IDC_RECORDING_COMBO));
  int i = box->GetCurSel();
  int n = box->GetLBTextLen(i);
  CString s;
  box->GetLBText(i, s.GetBuffer(n));
  PString setupDeviceName = s;
  s.ReleaseBuffer();

  if (setupDeviceName.IsEmpty()) return;
  if (setupDeviceName.Find("fake") == 0) return;
  if (setupDeviceName.Find("monitor") == 0) return;
  if (setupDeviceName.Find("zmonitor") == 0) return;
  PTRACE(4,"PVidDirectShow\tCurrent device: " << setupDeviceName);

  HRESULT hr;
  IBaseFilter * pFilter = NULL;
  IMoniker *pMoniker =NULL;
  ICreateDevEnum *pDevEnum =NULL;
  IEnumMoniker *pClassEnum = NULL;
  ULONG cFetched;

  ::CoInitialize(NULL);

  // Create the system device enumerator
  hr = CoCreateInstance (CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC, IID_ICreateDevEnum, (void **) &pDevEnum);
  if (FAILED(hr)) { ::CoUninitialize(); return; }

  // Create an enumerator for the video capture devices
  hr = pDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pClassEnum, 0);
  if (FAILED(hr)) { ::CoUninitialize(); return; }

  if (pClassEnum == NULL) { ::CoUninitialize(); return; }

  PTRACE(4,"PVidDirectShow\tEntering device enumeration loop...");
  while (1)
  { // Get the next device
    hr = pClassEnum->Next(1, &pMoniker, &cFetched);
    if (hr != S_OK) { PTRACE(4, "PVidDirectShow\tGetInputDeviceNames() No more video capture device"); break; }

    // Get the property bag
    IPropertyBag *pPropBag;

    hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void**)(&pPropBag));
    if (FAILED(hr))
    { PTRACE(4,"PVidDerectShow\tBindToStorage failed, continue");
      pMoniker->Release();
      continue;
    }

    // Find the description or friendly name.
    VARIANT DeviceName;
    DeviceName.vt = VT_BSTR;
    hr = pPropBag->Read(L"Description", &DeviceName, NULL);
    if (FAILED(hr)) hr = pPropBag->Read(L"FriendlyName", &DeviceName, NULL);
    if (SUCCEEDED(hr))
    { char *pDeviceName = BSTR_to_ANSI(DeviceName.bstrVal);
      if (pDeviceName)
      { PTRACE(4, "PVidDirectShow\tGetInputDeviceNames() Found this capture device '"<< pDeviceName <<"'");
        if(PString(pDeviceName) == setupDeviceName)
        {
          PTRACE(4, "PVidDirectShow\tCamera Setup: device found");
          pMoniker->BindToObject(0, 0, IID_IBaseFilter, (void**) &pFilter);
          ISpecifyPropertyPages *p_spec; CAUUID cauuid;
          HRESULT hr = pFilter->QueryInterface( IID_ISpecifyPropertyPages, (void **)&p_spec );
          if( !FAILED(hr) )
          if( SUCCEEDED(p_spec->GetPages( &cauuid )) )
          { if( cauuid.cElems > 0 )
            { HWND hwnd_desktop = ::GetDesktopWindow();
              OleCreatePropertyFrame( hwnd_desktop, 30, 30, NULL, 1, (LPUNKNOWN *)(&pFilter), cauuid.cElems, cauuid.pElems, 0, 0, NULL );
              CoTaskMemFree( cauuid.pElems );
            }
            p_spec->Release();
          }
        }
        free(pDeviceName);
      }
    }
    pPropBag->Release();
    pMoniker->Release();
  }

  ::CoUninitialize();
}