以下这个DLL库在VB中如何定义啊，试了好多种方法都不对
int WINAPI PSUpChar(int nAddr,int iBufferID, unsigned char* pTemplet, int* iTempletLength)

[解决办法]
你的定义是什么？

[解决办法]
int WINAPI PSUpChar(int nAddr,int iBufferID, unsigned char* pTemplet, int* iTempletLength

==>
public Declare Function PSUpChar Lib "xxx.dll" (ByVal nAddr As long, Byval iBufferID As long, byval pTemplet As string,iTempLetLength as long) As long

[解决办法]

VB code

Dim a As Stringa = Space(512) '<-凭经验，字符串应该由调用者分配空间bb = PSUpChar(&HFFFFFFFF, 0, a, 512)