C# 调用C++ dll
[DllImport("kernel32.dll", EntryPoint = "LoadLibrary", CallingConvention = CallingConvention.StdCall)]
public static extern int LoadLibrary([MarshalAs(UnmanagedType.LPStr)] string lpLibFileName);
[DllImport("kernel32.dll", EntryPoint = "GetProcAddress", CallingConvention = CallingConvention.StdCall)]
public static extern IntPtr GetProcAddress(int hModule, [MarshalAs(UnmanagedType.LPStr)] string lpProcName);
[DllImport("kernel32.dll", EntryPoint = "FreeLibrary", CallingConvention = CallingConvention.StdCall)]
public static extern bool FreeLibrary(int hModule);
/// <summary>
/// 根据dll地址获取委托
/// </summary>
/// <param name="dllModule">调用 LoadLibrary后得到的int 值</param>
/// <param name="functionName">在dll中约定的函数名称</param>
/// <param name="t">接收dll约定函数的委托</param>
/// <returns></returns>
public static Delegate GetDelegateFromAddress(int dllModule, string functionName, Type t)
{
IntPtr address = GetProcAddress(dllModule, functionName);
if (address == IntPtr.Zero)
return null;
return Marshal.GetDelegateForFunctionPointer(address, t);
}
/// <summary>
/// 根据指针获取委托
/// </summary>
/// <param name="address"></param>
/// <param name="t"></param>
/// <returns></returns>
public static Delegate GetDelegateFromIntPtr(IntPtr address, Type t)
{
if (address == IntPtr.Zero)
return null;
return Marshal.GetDelegateForFunctionPointer(address, t);
}
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