(Unnamed ExStyle): Specify a plus or minus sign followed immediately by the letter E and a decimal or hexadecimal extended style number. If the sign is omitted, a plus sign is assumed. For example, E0x200 would add the WS_EX_CLIENTEDGE style, which provides a border with a sunken edge that might be appropriate for pictures and other controls.
Although the other extended styles are not documented here (since they are rarely used), they can be discovered by searching for WS_EX_CLIENTEDGE at
www.microsoft.com.