CCombobox enhancement to help with Text and item data

Download Source Code

The purpose of TComboBox is to make life easier for programmers when dealing with comboboxes that need to store a string, integer, etc. value as the code for any given string that is displayed. The "code" that I am referring to is the item data of the combobox itself (see the SetItemData() member function of CComboBox).

For example:

	// Header file contains entry for the TComboBox member variable.
	CTCombobox myCombo;
	CString m_csCodeOneStr;

	// Implementation file contains initialization of the combobox
	// Standard combobox method:

		// Special note: We have to use a member CString object so that 
		// when the string goes out of scope (because the OnInitDialog() 
		// function ends), the code string will still exist.
		m_csCodeOneStr = "Code1";

		DWORD dwCode = &m_csCodeOneStr;
		int nComboEntry;
		nComboEntry = myCombo.AddString("Here's one");

		if (nComboEntry != CB_ERR)
			myCombo.SetItemData(nComboEntry, dwCode);

	// Implementation file contains initialization of the combobox
	// TComboBox method:

		MyCombo.AddEntry("Here's one", "Code1");


You can now use the GetCode() method of TComboBox to retrieve the code for any item (or the currently selected item). This is of course instead of having to typedef the DWORD parameter over into a CString.

For example:

	CString csCodeValue;


	myCombo.GetCode(0, csCodeValue);

Last updated: 26 July 1998


  • How can i add/store data(e.g dates) in the Combo box

    Posted by Legacy on 06/05/2003 12:00am

    Originally posted by: Ananias Kgabo

    Hellow there,

    My name is Kgabo and the problem i'm facing right now is the use of Combobox.WE as a Project team,we are in position where we must make use of the ComboBox in our Project.

    Can you please help with whatever related infomation(ComboBOX)

    You can send it to my e-mail
    I'll be thankful Should you give a helping hand.
    you'll be saving the World too.

  • DWORD problems

    Posted by Legacy on 05/31/2000 12:00am

    Originally posted by: Dave

    well its said that the DWORD assignment of the CString variable does not work and so a pointer must be used...
    but i cant get the thing to

    DWORD *mydata = &mystring.

    m_mycombo.SetItemData(0, *mydata)

    can anyone help? i also will need help to use GetItemData since it returns void*????

  • DWORD dwCode = &m_csCodeOneStr; error

    Posted by Legacy on 04/25/2000 12:00am

    Originally posted by: bae woo sung

    DWORD dwCode = &m_csCodeOneStr; 

    this statement is error..

    i don't know why error happens ..

    Can you know me the reason ?

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • On-demand Event Event Date: September 23, 2015 The cloud is not just about a runtime platform for your projects – now, you can do your development in the cloud, too. Check out this webcast to learn how the cloud improves your development experience and team collaboration. Join Dana Singleterry, Principal Product Manager for Oracle Dev Tools, as he discusses how to simplify every aspect of the development lifecycle, including requirements gathering, version management, code reviews, build automation, and …

  • Lenovo recommends Windows 8 Pro. "I dropped my laptop getting out of the taxi." This probably sounds familiar to most IT professionals. If your employees are traveling, you know their devices are in for a rough go. Whether it's a trip to the conference room or a convention out of town, any time equipment leaves a user's desk it is at risk of being put into harm's way. Stay connected at all times, whether at the office or on the go, with agile, durable, and flexible devices like the Lenovo® …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date