struct UIM_BOOK_STRUCT
{
int UimIndex;
char szName[15];
char szPhone[21];
};
int ReadUimAllBook(UIM_BOOK_STRUCT lpUimBookItem[]，int nMaxArraySize);

 

 　　C#引用

 

[StructLayout(LayoutKind.Sequential， CharSet = CharSet.Ansi)]//可以指定编码类型
public struct UIM_BOOK_STRUCT
{
public int UimIndex;
[MarshalAs(UnmanagedType.ByValTStr， SizeConst= 15)]
public string szName;
[MarshalAs(UnmanagedType.ByValTStr， SizeConst= 21)]
public string szPhone;
};
[DllImport( "CdmaCard.dll"，EntryPoint="ReadUimAllBook")]
public    static    extern   int ReadUimAllBook([Out] UIM_BOOK_STRUCT [] lpUimBookItem，int nMaxArraySize);
UIM_BOOK_STRUCT[] p = new UIM_BOOK_STRUCT[20];
int ret = ReadUimAllBook(p，p.Length);

　　6. 注意问题
　　类型不一致，会导致调用失败，
　　(1) long 类型，在C++中是4字节的整数，在C#中是8字节的整数;
　　(2) 字符串类型的设置不正确;
　　以下是几个简单的window调用

 

[System.Security.SuppressUnmanagedCodeSecurity] // We won't use this maliciously
[DllImport("User32.dll"， CharSet=CharSet.Auto)]
public static extern bool ScreenToClient(IntPtr hWnd， ref System.Drawing.Point rect);
[System.Security.SuppressUnmanagedCodeSecurity] // We won't use this maliciously
[DllImport("User32.dll"， CharSet=CharSet.Auto)]
public static extern bool GetWindowRect(IntPtr hWnd， out System.Drawing.Rectangle rect);
[System.Security.SuppressUnmanagedCodeSecurity] // We won't use this maliciously
[DllImport("User32.dll"， CharSet=CharSet.Auto)]
public static extern bool UnregisterClass([MarshalAs(UnmanagedType.LPTStr)] string className， IntPtr instanceHandle);