UC/GUI添加视窗管理器WM头文件不存在

我将WM添加到工程之后，编译出现好几个错误，都是头文件不存在的错误，如下：
..GUIGUIDemoGUIDEMO.c(23): error:  #5: cannot open source input file "PROGBAR.h": No such file or directory
..GUIGUIDemoGUIDEMO_Dialog.c(28): error:  #5: cannot open source input file "DIALOG.h": No such file or directory
..GUIGUIDemoGUIDEMO_FrameWin.c(27): error:  #5: cannot open source input file "LISTBOX.h": No such file or directory
..GUIGUIDemoGUIDEMO_Messagebox.c(28): error:  #5: cannot open source input file "DIALOG.h": No such file or directory
..GUIGUIDemoGUIDEMO_Navi.c(28): error:  #5: cannot open source input file "FRAMEWIN.h": No such file or directory
..GUIGUIDemoGUIDEMO_ProgBar.c(25): error:  #5: cannot open source input file "PROGBAR.h": No such file or directory
..GUIWMWM_SetScrollbar.c(21): error:  #5: cannot open source input file "SCROLLBAR.h": No such file or directory
是不是我源码缺失的问题，还是什么？求指教