I am setting Owner Draw property combined with HasStrings for CComboBox,
However when there is more than one item, the dropdown does not show Full.
Can I change this mechanism?
I am setting Owner Draw property combined with HasStrings for CComboBox,
However when there is more than one item, the dropdown does not show Full.
Can I change this mechanism?

At design time, select your combobox:
The click again on combobox:
As you see, you have a handle from where you can increase your vertical size of your combobox as you wish:
At runtime you'll see the drop down list as you designed.