＃include BOOL WINAPI CryptSignHash( HCRYPTHASH hHash, // in DWORD dwKeySpec, // in LPCTSTR sDescription,//in DWORD dwFlags, // in BYTE ＊pbSignature, // out DWORD ＊pdwSigLen // in/out );
＃include BOOL WINAPI CryptVerifySignature( BYTE ＊pbSignature, // in DWORD dwSigLen, // in HCRYPTKEY hPubKey, // in LPCTSTR sDescription, // in DWORD dwFlags // in ); ----由于这两个函数是C语言的定义，其中的pbSignature变量是用户数据（二进制类型）的缓冲区的指针，而在VB中是没有指针这个定义的，因此，笔者通过利用VB的BYTE数组实现了C语言的指针。
----以上两个函数在VB中的定义如下：
Private Declare Function CryptSignHashA Lib “advapi32.dll" (ByVal hHash As Long, _ ByVal dwKeySpec As Long, ByVal sDescription As String, ByVal dwFlags As Long, _ ByRef pbSignature As Byte, pdwSigLen As Long) As Long
Private Declare Function CryptVerifySignatureA Lib “advapi32.dll" (ByVal hHash As Long, _ ByRef pbSignature As Byte, ByVal dwSigLen As Long, ByVal hPubKey As Long, _ ByVal sDescription As String, ByVal dwFlags As Long) As Long
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