An application sends a CB_GETDROPPEDCONTROLRECT message to retrieve the screen coordinates of the drop-down list box of a combo box.
CB_GETDROPPEDCONTROLRECT
wParam = 0; // not used; must be zero
lParam = (LPARAM) (RECT FAR*) lprc; // address of RECT structure
Parameters
lprc
Value of lParam. Points to the RECT structure that is to receive the coordinates.
Return Values
This message always returns CB_OKAY.
See Also