WS_CHILD | SBS_HORZ, /* scroll bar styles */
0, /* horizontal position */
0, /* vertical position */
200, /* width of the scroll bar */
CW_USEDEFAULT, /* default height */
hwnd, /* handle of main window */
(HMENU) NULL, /* no menu for a scroll bar */
hinst, /* instance owning this window */
(LPVOID) NULL /* pointer not needed */
);