我有这个DLL,要用GetActiveTagData这个函数,但我只知道他在VB中的声明:Public Declare Function GetActiveTagData Lib "Mr3001ADll.dll" (ByVal hCom As Long, ByVal NetAddr As Byte, ByRef cnt As Byte, ByRef Value As Byte) As Integer
请问我这样写对。运行没报错但读不出数据来。
[DllImport("Mr3001ADll.dll",
EntryPoint = "GetActiveTagData",
CharSet = CharSet.Ansi,
CallingConvention = CallingConvention.StdCall)]
public static extern bool GetActiveTagData(
int hCom,
ref byte NetAddr,
ref byte cnt,
ref byte value);
求解!谢谢!
请问我这样写对。运行没报错但读不出数据来。
[DllImport("Mr3001ADll.dll",
EntryPoint = "GetActiveTagData",
CharSet = CharSet.Ansi,
CallingConvention = CallingConvention.StdCall)]
public static extern bool GetActiveTagData(
int hCom,
ref byte NetAddr,
ref byte cnt,
ref byte value);
求解!谢谢!
public static extern int GetActiveTagData(
long hCom,
byte NetAddr,
ref byte cnt,
ref byte value);
int hCom,
byte NetAddr,
ref byte cnt,
ref byte value);
按1楼的改过来,调用还是取不到值??