CComboBox question...

Hi,

I create CComboBox control dynamically in my program using the .Create() method, I fill the control with data, but when I run the program and click on the combo-box to expand its list - I can see only the first option and NO list is opened, how can I define the list length ?

Thanks

Just use SetItemHeight()

MSDN Code:

Code:

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// The pointer to my combo box.
extern CComboBox* pmyComboBox;

// Set the height of every item to be the
// vertical size of the item's text extent.
CString str;
CSize  sz;
int    dx=0;
CDC*    pDC = pmyComboBox->GetDC();
for (int i=0;i < pmyComboBox->GetCount();i++)
{
  pmyComboBox->GetLBText( i, str );
  sz = pDC->GetTextExtent(str);

  pmyComboBox->SetItemHeight( i, sz.cy );
}
pmyComboBox->ReleaseDC(pDC);

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I think you are looking for SetDroppedWidth() and SetHorizontalExtent().

You can specify the height of the drop down list by using the CB_SETMINVISIBLE message or the ComboBox_SetMinVisible macro, however that is for Windows XP or later only.

You can also change the height of the listbox by using SetWindowPos.

CB_SETMINVISIBLE is ok, but it requires Windows XP. For a more generic solution use the code bellow:

Code:

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        // assuming cbo is a CComboBox

        CRect rect;
        cbo.GetWindowRect( rect);
        rect.bottom += 100;
        cbo.MoveWindow( rect);

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Basically, setting the Combo's height affects the height of the drop list.

Quote:

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Originally Posted by PadexArt

CB_SETMINVISIBLE is ok, but it requires Windows XP. For a more generic solution use the code bellow:

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Exactly, that's why I edited my post immediately after posting it ;)

Quote:

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Originally Posted by Marc G

Exactly, that's why I edited my post immediately after posting it ;)

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I was adding my answer at the same time (11:01 - 11:02). ;)