ComboBox dropdown list that expand to the left

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MFC

Hi,

The length of the string listed in my ComboBox dropdown list exceeds the width of my ComboBox. To fix this, I used CComboBox::SetDroppedWidth to increase the dropdown list width.

However, the dialog containing the ComboBox is located at the right side of my screen. At times, there are not enough screen area to display the dropdown list.

What I'm trying to do is have the ComboBox dropdown list expands to the left, instead of the normal expands to the right. This way, the dropdown list can display all the options in full, regardless of the ComboBox size. Any idea how I can achieve this?