C# 如何使用结构指针导入非托管dll？

我可以DllImport常用函数，但这类导入失败，下面是DLL头文件

typedef struct
{
   VOID (* API_GetUID)(CHAR *pData, DWORD DataLen);

   DWORD (* API_GetChipType)();

} API_FUNCTION_STRUCT, *API_FUNCTION_STRUCT;

extern VOID WINAPI GetAPIObject(API_FUNCTION_STRUCT *pApiFunc);

我不能用C写正确的结构

更新：

public struct test
{
delegate void API_GetUID(IntPtr pData, int DataLen);
delegate void API_GetChipType();
}

---

您可能需要使用

这需要一个指向本机方法的

IntPtr

，并返回一个可以调用的委托

public struct test
{
    IntPtr API_GetUID;
    IntPtr API_GetChipType;
} 

[DllImport(@"GDevice.dll")]
public static extern void GetAPIObject(ref test test_a);

delegate void GetUID_Delegate(IntPtr pData, uint dataLen);
delegate uint GetChipType_Delegate();

test a = new test();
GetAPIObject(ref a);

GetUID_Delegate getUID = Marshal.GetDelegateForFunctionPointer<GetUID_Delegate>(a.API_GetUID);
GetChipType_Delegate getChipType = Marshal.GetDelegateForFunctionPointer<GetChipType_Delegate>(a.API_GetChipType);

uint chipType = getChipType();

---

我可以导入一些没有指针的函数，我想我应该用c#编写一个结构，但我不知道如何处理pointer@igelineau，我还是不能让它工作。你能帮忙吗？这到底是怎么失败的？您是否尝试过使用IntPtr作为方法参数而不是ref？您的

struct

需要包含某种形式的函数指针，而不是方法。可能具有正确封送批注的委托会起作用。@code谢谢，我已经更新了内容，我已经测试了委托方法，但我找不到调用它的方法。你能给我举个例子吗？@lbasa谢谢，我在.Net CF上工作，没有GetDelegateForFunctionPointer。哦，那可能会很棘手，我会用另一种方式编辑。

public struct test
{
    IntPtr API_GetUID;
    IntPtr API_GetChipType;
} 

[DllImport(@"GDevice.dll")]
public static extern void GetAPIObject(ref test test_a);

delegate void GetUID_Delegate(IntPtr pData, uint dataLen);
delegate uint GetChipType_Delegate();

test a = new test();
GetAPIObject(ref a);

GetUID_Delegate getUID = Marshal.GetDelegateForFunctionPointer<GetUID_Delegate>(a.API_GetUID);
GetChipType_Delegate getChipType = Marshal.GetDelegateForFunctionPointer<GetChipType_Delegate>(a.API_GetChipType);

uint chipType = getChipType();

public struct test
{
    GetUID_Delegate API_GetUID;
    GetChipType_Delegate API_GetChipType;

    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    delegate void GetUID_Delegate(IntPtr pData, uint dataLen);
    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    delegate uint GetChipType_Delegate();
} 

[DllImport(@"GDevice.dll")]
public static extern void GetAPIObject(ref test test_a);

test a = new test();
GetAPIObject(ref a);

uint chipType = a.API_GetChipType();