Basic Question: Combo box won't show list when click the arrow


  I added a Combo box from Visual C++ toolbox to my dialog and created a member variable (CComboBox m_MacCombo;). In OnInitDialog(), I added two strings to the combo box
(m_MacCombo.AddString("Test 0");
 m_MacCombo.AddString("Test 1");)

  I expected to see two strings when I clicked the arrow on the combo box. But nothing showed in the combo box. Do I need to do something else? Thanks.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

I tried this out and I only got nothing in the combo box when I did not add the call to the parent function
CDialog::OnInitDialog();  into my OnInitDialog before adding the two strings to the combo box...

so make sure you have something like this:

BOOL CMyDialog::OnInitDialog
    m_MacCombo.AddString("Test 0");
    m_MacCombo.AddString("Test 1");

:) emily
qwang73Author Commented:

  Thanks for your comment. But there was a call to the parent function CDialog::OnInitDialog() in my OnInitDialog(). Actually AppWizard generated most of the OnInitDialog() code. All I did was adding those two lines.

  Any other suggestions?

Go to the resource editor and resize combo box's height.

Experts Exchange Solution brought to you by ConnectWise

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
You can also use this code for resizing:

CWnd* pwndCombo = GetDlgItem(IDC_MYCOMBO);

CRect wndRect;

pwndCombo->SetWindowPos(NULL, 0, 0, wndRect.Width(), wndRect.Height()+50, SWP_NOMOVE);

qwang73Author Commented:

  That's it. I didn't make the combo box tall enough. Thanks for your help.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.