我在c++ builder中,调用api函数ch375OpenDevice(),失败。
HINSTANCE dllInstance= LoadLibrary("CH375DLL.DLL"); //动态调用DLL
if (dllInstance==NULL ) //判断是否调用成功 ShowMessage("无法加载CH372的DLL文件"); else ShowMessage("加载CH372的DLL文件成功"); if (CH375OpenDevice( iIndex )!=INVALID_HANDLE_VALUE) //打开ch372设备 ShowMessage("无法打开CH372"); else ShowMessage("打开CH372成功"); 程序报错:
[Linker Error] Unresolved external 'CH375OpenDevice' referenced from E:\USB_WIN32\UNIT1.OBJ 请问这是为什么???