Question

I wanted to ask about winApi 32 custom icons creation. When I define icon in recource.h:

#define IDI_MYICON 1

What does that number, in this case 1 mean?
And what about IDI is it just a standard or it actually means something?

Answer 1

1 is the value, IDI_MYICON is just a placeholder for the 1

IDI is an prefix and stands for An Icon or bitmap resource

see this list

Normaly ResourceID’s get assigned automaticly by Visual Studio (or other IDE).

So you could use IDI_MYICON instead of using the 1 in your code.