You can do it in this way:
HWND hed;
hed = CreateWindowEx
(
0,
__TEXT("EDIT"),
__TEXT(""),
WS_CHILD|WS_CLIPSIBLINGS|ES_AUTOHSCROLL,
rcPos.left,
rcPos.top,
rcPos.right-rcPos.left,
rcPos.bottom-rcPos.top,
hWndParent,
(HMENU)0,
(HINSTANCE)0,
0
);
Use the help manual for the edit control styles (ES_...).
Good luck.