An application sends a CB_GETDROPPEDSTATE message to determine whether the list box of a combo box is dropped down.
CB_GETDROPPEDSTATE
wParam = 0; // not used; must be zero
lParam = 0; // not used; must be zero
Parameters
This message has no parameters.
Return Values
If the list box is visible, the return value is TRUE; otherwise, it is FALSE.
See Also