... using: CONTROL "SysTabControl32", 6100, "SysTabControl32", 0 | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 6, 6, 423, 299 I was told ages ago to change to SysTabControl32 I notice that testfld6.rc uses CONTROL FOLDER32, 6100, FOLDER32, 0 | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 6, 6, ...