调用winscard.dll（winscard.h这是微软标准的库），进行SLE4432、4442的调用。-Call winscard.dll (winscard.h This is Microsoft' s standard library), to conduct SLE4432 and 4442 calls.

PC/SC接口包含30多个以Scard为前缀的函数，所有函数的原型都在winscard.h中声明，应用程序需要包含winscard.lib，所有函数的正常返回值都是SCARD_S_SUCCESS。在这30多个函数中，常用的函数只有几个，与智能卡的访问流程（图2）对应，下面将详细介绍这些常用函数。-PC/SC interface contains over 30 Scard prefix function, all functions of the prototype is declared in

The WinSCard API makes direct exchange of data between readers and cards possible by using APDUs. The WinSCard API’s C functions are declared in the header file, winscard.h, and the return codes are declared in winerror.h.