WINCE6.0动态加载驱动问题

出现如下错误
BUILD: [00:0000000026:PROGC ] Building LIB Pass in D:\WINCE600\PLATFORM\LPC32XX\src\drivers\GPIO\ directory.
BUILD: [01:0000000036:PROGC ] Linking D:\WINCE600\platform\LPC32XX\lib\ARMV4I\debug\GPIO.lib
BUILD: [01:0000000045:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_Close
BUILD: [01:0000000046:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_Deinit
BUILD: [01:0000000047:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_IOControl
BUILD: [01:0000000048:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_Init
BUILD: [01:0000000049:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_Open
BUILD: [01:0000000050:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_PowerDown
BUILD: [01:0000000051:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_PowerUp
BUILD: [01:0000000052:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_Read
BUILD: [01:0000000053:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_Seek
BUILD: [01:0000000054:ERRORE] GPIO.def : error LNK2001: unresolved external symbol GPI_Write
BUILD: [01:0000000055:ERRORE] D:\WINCE600\platform\LPC32XX\lib\ARMV4I\debug\GPIO.lib : fatal error LNK1120: 10 unresolved externals


以下是我的GPIO.def
LIBRARY GPIO

EXPORTS
GPI_Init
GPI_Deinit
GPI_Open
GPI_Close
GPI_Read
GPI_Write
GPI_Seek
GPI_IOControl
GPI_PowerDown
GPI_PowerUp
说明WINCE6.0，我在DRIVER下建立的是一个动态WCE Dymanic-Link Library 驱动文件，然后单独编译，而D:\WINCE600\platform\LPC32XX\lib\ARMV4I\debug\GPIO.lib下没有 GPIO.lib这个文件，是不是还要设置那呢？