Home/ Questions/Q 6387497
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-25T03:09:33+00:00

I’m looking through the source of a C# program that uses a library written

  • 0

I’m looking through the source of a C# program that uses a library written in C. I came across this line and was unsure what it was:

cvbimUNSAFE.GetImageVPA ((cvbim.IMG)cvImg.Image, 0, (void**)&lpImageBits, &pVPAT);

What is an object of type void **? I did some Google searches and could only find information about void*, which is a pointer to a sort of catch all top level type, if I understood correctly.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    It’s a pointer to a pointer to something not specified. Basically, just think of it as a memory pointer to a raw memory pointer.

    So, int** is a pointer to a pointer to an int, but void** is a pointer to a pointer, but it’s not specified what that pointer is pointing at.

    I did some google searches and could only find information about void*, which is a pointer to a sort of catch all top level type, if I understood correctly.

    Not quite. void* is a pointer to something, it’s just not specified what that something is and should just be thought of as a pointer to a raw hunk of memory that you have to apply some structure to. For example, malloc returns a void* because it’s returning a pointer to a raw hunk of memory.

    • 0