ATL / WTL / STL

<br />
// aboutdlg.h : interface of the CAboutDlg class<br />
//<br />
/////////////////////////////////////////////////////////////////////////////<br />
<br />
#if !defined(AFX_ABOUTDLG_H__A290BA10_FE73_4A12_8FCA_FEBA7A47586B__INCLUDED_)<br />
#define AFX_ABOUTDLG_H__A290BA10_FE73_4A12_8FCA_FEBA7A47586B__INCLUDED_<br />
<br />
class CAboutDlg : public CAxDialogImpl<CAboutDlg>,<br />
                  public CWinDataExchange<CAboutDlg>,<br />
                  public CComObjectRootEx<<CComSingleThreadModel>,<br />
                  public CComCoClass<CAboutDlg><br />
{<br />
public:<br />
	enum { IDD = IDD_ABOUTBOX };<br />
<br />
	BEGIN_MSG_MAP(CAboutDlg)<br />
		MESSAGE_HANDLER(WM_INITDIALOG, OnInitDialog)<br />
		COMMAND_ID_HANDLER(IDOK, OnCloseCmd)<br />
		COMMAND_ID_HANDLER(IDCANCEL, OnCloseCmd)<br />
      COMMAND_HANDLER(IDC_COMBO_TARGET, CBN_SELCHANGE, OnSelchangeCombo_target)<br />
      COMMAND_HANDLER(IDC_COMBO_TARGET, CBN_DROPDOWN, OnDropdownCombo_target)<br />
	END_MSG_MAP()<br />
<br />
// Handler prototypes (uncomment arguments if needed):<br />
//	LRESULT MessageHandler(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)<br />
//	LRESULT CommandHandler(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)<br />
//	LRESULT NotifyHandler(int /*idCtrl*/, LPNMHDR /*pnmh*/, BOOL& /*bHandled*/)<br />
<br />
	LRESULT OnInitDialog(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);<br />
	LRESULT OnCloseCmd(WORD /*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/);<br />
   LRESULT OnSelchangeCombo_target(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);<br />
   LRESULT OnDropdownCombo_target(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);<br />
<br />
private:<br />
   CComboBoxImpl m_pComboBox;<br />
   CString m_szTargetLayer;<br />
};<br />
<br />
#endif // !defined(AFX_ABOUTDLG_H__A290BA10_FE73_4A12_8FCA_FEBA7A47586B__INCLUDED_)<br />

<br />
// aboutdlg.cpp : implementation of the CAboutDlg class<br />
//<br />
/////////////////////////////////////////////////////////////////////////////<br />
<br />
#include "stdafx.h"<br />
#include "resource.h"<br />
<br />
#include "aboutdlg.h"<br />
<br />
LRESULT CAboutDlg::OnInitDialog(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)<br />
{<br />
	CenterWindow(GetParent());<br />
	return TRUE;<br />
}<br />
<br />
LRESULT CAboutDlg::OnCloseCmd(WORD /*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/)<br />
{<br />
	EndDialog(wID);<br />
	return 0;<br />
}<br />
<br />
LRESULT CAboutDlg::OnSelchangeCombo_target(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)<br />
{<br />
   //DoDataExhange(true);<br />
   //UpdateData();<br />
	// TODO : Add Code for control notification handler.<br />
   CString pValueString;<br />
   //BSTR pValueString;<br />
   int i = this->m_pComboBox.GetDlgItemText(IDC_COMBO_TARGET, &pValueString);<br />
   //this->m_pComboBox.GetLBText(wNotifyCode, pValueString);<br />
<br />
   //AtlMessageBox(NULL, pValueString.AllocSysString(), _T("Selection"), MB_OK);<br />
	return 0;<br />
}<br />
LRESULT CAboutDlg::OnDropdownCombo_target(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)<br />
{<br />
   HRESULT hr;<br />
   return 0;<br />
}<br />

<br />
#define _WTL_USE_CSTRING<br />
#define _ATL_APARTMENT_THREADED<br />
<br />
//.... other stuff..<br />
<br />
#include <atlcom.h><br />
#include <atlhost.h><br />
#include <atlwin.h><br />
#include <atlctl.h><br />
<br />
#include <atlframe.h><br />
#include <atlcrack.h><br />
#include <atlmisc.h><br />
#include <atlctrls.h><br />
#include <atlctrlx.h><br />
#include <atldlgs.h><br />
//#include <atlctrlw.h><br />
#include <atlddx.h><br />
<br />
//.. other stuff..<br />
<br />
class CComboBoxImpl : public CWindowImpl<CComboBoxImpl, CComboBox><br />
    { DECLARE_EMPTY_MSG_MAP(); };<br />

<br />
LRESULT CAboutDlg::OnSelchangeCombo_target(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)<br />
{<br />
   DoDataExhange(true); //gives>error C2065: 'DoDataExhange' : undeclared identifier<br />
   CString pValueString;<br />
   //error C2664: 'int __thiscall ATL::CWindow::GetDlgItemTextA(int,unsigned short *& ) const' : cannot<br />
   //convert parameter 2 from 'class WTL::CString *' to 'unsigned short *& ' <br />
   //A reference that is not to 'const' cannot be bound to a non-lvalue<br />
   int i = this->m_pComboBox.GetDlgItemText(IDC_COMBO_TARGET, &pValueString);<br />
<br />
   //works, but how can you find out which was selected<br />
   //this->m_pComboBox.GetLBText(wNotifyCode, pValueString);<br />
<br />
   //AtlMessageBox(NULL, pValueString.AllocSysString(), _T("Selection"), MB_OK);<br />
   return 0;<br />
}<br />
</code<br />
<br />
The message map to test dataexchange is defined as<br />
<br />
<code><br />
BEGIN_DDX_MAP(CAboutDlg)<br />
   //DDX_CONTROL(IDC_STATIC_PIC, m_pPic)<br />
   DDX_CONTROL(IDC_COMBO_TARGET, m_pComboBox)<br />
   DDX_TEXT(IDC_COMBO_TARGET, m_szTargetLayer)<br />
END_DDX_MAP()<br />