Can anyone find equivalent c# code

Question

This is c++ code CreateImageSnapshot, (int, eImageFormat, BYTE**) in VC++ we implementing BYTE**

PlayerLib::CreateImageSnapshot (iPlayerRef,static_cast<eImageFormat>(lFormat),
        &pBuffer);

here i need to import the dll and do the same process in c#.. Can anyone find equivalent C# code like

[DllImport("PlayerLib", SetLastError = false, 
                   EntryPoint = "CreateImageSnapshot")]
public static extern int CreateImageSnapshot(...);

Here I need to extern the CreateImageSnapshot function and I want to know how to pass the argument

thanks in advance

Answer 1

i guess that BYTE** in c# is byte[][]

Answer 2

As I suggested in you previous question the definition will be:

[DllImport("PlayerLib", SetLastError = false, EntryPoint = "CreateImageSnapshot")]
public static extern int CreateImageSnapshot(int player, eImageFormat imgFormat,
                                             ref IntPtr imgBuffer);


byte[] img;
IntPtr imgBuff = new IntPtr();

int res = CreateImageSnapshot(1, eImageFormat.jpeg, ref imgBuff);
int size = ????
if (res > 0)
{
  img = new byte[size];
  Marshal.Copy(imgBuff, img, 0, size);
}

but you unmanaged function does not returns the size of buffer. you need to add one more parameter to your func or return array lenth in res.