5. Setting the Scroll Bar Position

You can use SetScrollPos to set a new thumb position within the scroll bar range:

SetScrollPos (hwnd, iBar, iPos, bRedraw);

hwnd:	Handle to the window
iBar:	Either SB_VERT or SB_HORZ
iPos:	The new thumb position
bRedraw:	true, to redraw the scroll bar based on new range, or false