How to Find out what was selected in Combo Box

[Larry Mills Sr]

During the creation of my Combo Box I entered the data into it for selection of the User. How do I find out what the User selected? Please provide some code please.(VS 6.0 and VS 2008 C++) A C++ programming language novice, but striving to learn

[Hamid Taebi]

Do you want to get value or focus on combobox?

[Mark Salsbery]

When the user changes the selected item, the parent will receive a CBN_SELCHANGE notification (in a WM_COMMAND message). In response to that notification, or at some other time you need the selected item from the combo box, you could do something like this:

LRESULT SelectedIndex = SendMessage(hwndComboBox, CB_GETCURSEL, 0, 0);
if (CB_ERR != SelectedIndex)
{
LRESULT StringLength = SendMessage(hwndComboBox, CB_GETLBTEXTLEN, SelectedIndex, 0);
TCHAR *pSelectedString = new TCHAR[StringLength + 1];
SendMessage(hwndComboBox, CB_GETLBTEXT, SelectedIndex, (LPARAM)pSelectedString);
//...
//... do something with the string ...
//...
delete[] pSelectedString;
}

All Windows controls have associated messages used to manipulate them. Unless you have them all memoized, I recommend keeping a link to this: Windows Controls[^] or know where to find it in your local documentation.

Mark Salsbery Microsoft MVP - Visual C++ :java:

[ddspliting]

Hey! Well i dun ve visual studio 08. But i can provide you a help in visual studio 6.0. Now as you have already entered data to the combo box.Add new variable for the Combo Box in class wizard. it can be of type VALUE or CONTROL. Let it be VALUE and type CString. This variable will hold the data present in the Combo Box.Let the variable is ComboBox_Variable. Now to check what user has selected, you can put a simple event in your program which will help in finding what user has selected from the box. so you can add a button which will show a simple messagebox depending on the combo box data. Like a button named "Message". Add an event handler for it and you can use the following code. CString example; example = ComboBox_Variable; if(example=="Data-1") MessageBox("Data-1 selected by user"); else if(example=="Data-2") MessageBox("Data-2 selected by user"); You can use switch statement too! I hope Combo Box will be clear to you now!