Hello everbody,

I want to marshal structs but I always recieve following error
"Can not marshal field ValueF of type STRUCT_B: This type can not be
marshaled as a structure field."

I have the following two structs:

typedef struct STRUCT_A
{
 int ValueA;
 char ValueB[64];
 int ValueC;
 int ValueD;
}

typedef struct STRUCT_B
{
 int  ValueE;
 STRUCT_A ValueF[128];
 int  ValueG;
}

and defined the in C# as

[StructLayout(LayoutKind.Sequential)]
public class STRUCT_A
{
 public Int32  ValueA;
 [MarshalAs(UnmanagedType.ByValTStr, SizeConst=64)]
 public string ValueB;
 public Int32  ValueC;
 public Int32  ValueD;
}

and

[StructLayout(LayoutKind.Sequential)]
public struct STRUCT_B
{
 public Int32  ValueE;
 [MarshalAs(UnmanagedType.ByValArray, SizeConst=128,
ArraySubType=UnmanagedType.Struct)]
 public STRUCT_A[] ValueF;
 public Int32  ValueG;
}

Can anyone tell me how to correctly marshal the structs?

Thanks in advance,

Lars