I just noticed that the combo box has no way to scroll unless you use
the style CBS_AUTOHSCROLL which is 0x0040.
I did not find either any of the combobox style seems to be exported
 
Anyway, the code below from MSDN if it will be added to the package,
it will benice also if it is coded also as functions so it can be changed at
runtime:
 
 
/*
 * Combo Box styles
 */
#define CBS_SIMPLE            0x0001L
#define CBS_DROPDOWN          0x0002L
#define CBS_DROPDOWNLIST      0x0003L
#define CBS_OWNERDRAWFIXED    0x0010L
#define CBS_OWNERDRAWVARIABLE 0x0020L
#define CBS_AUTOHSCROLL       0x0040L
#define CBS_OEMCONVERT        0x0080L
#define CBS_SORT              0x0100L
#define CBS_HASSTRINGS        0x0200L
#define CBS_NOINTEGRALHEIGHT  0x0400L
#define CBS_DISABLENOSCROLL   0x0800L
#if(WINVER >= 0x0400)
#define CBS_UPPERCASE           0x2000L
#define CBS_LOWERCASE           0x4000L
#endif /* WINVER >= 0x0400 */
 
Ramy