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Initializing ComboBox inside CDialogBar

Posted on 1998-11-30
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Last Modified: 2013-11-20
I am trying to initialize a CComboBox control in a CDialogBar created with the Resource editor.  I attach the tool bar to a Child Window in an MDI app.  I want to fill the contents of the CboBox when the tool bar is loaded.

This is how I am trying to do it...
-- inside   CMyChildFrm::OnCreate(....)
CComboBox* pCombo;

pCombo = (CComboBox*)GetDlgItem(IDC_COMBOBOX);
pCombo->AddString("SomeString");

I am sure I am just overlooking something, what am I doing wrong???

The assertion error occurs when the pCombo->AddString("") is attempted.  It is an Access Violation.

What is the proper casting and access method?

Thanks,
J.R.
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Question by:jrmcg
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3 Comments
 
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Accepted Solution

by:
plaroche earned 100 total points
ID: 1325504
Put a breakpoint and check the status of the pCombo variable, it points to nothing.

You cannot ask your child frame to give you a pointer to IDC_COMBOBOX since that combobox belongs to your dialogbar.

Your childframe can ask the dialogbar for a pointer to that object once that dialogbar is created.

CComboBox* pCombo;
CDialogBar* pBar;
pCombo = (CComboBox*)pBar->GetDlgItem(IDC_COMBOBOX);
if( pCombo != NULL && pCombo->IsKindOf(CComboBox) ) {
  pCombo->AddString("SomeString");
}

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Expert Comment

by:plaroche
ID: 1325505
Sorry, in my answer pBar will be invalid. What I meant was that pBar should be a pointer to your previously created dialogbar object.
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LVL 2

Author Comment

by:jrmcg
ID: 1325506
That did it.  Thanks.  I knew it would be something simple.

J.R.
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