directx c++
Author
I Have done some VB6 and directX8 and now I am looking at c++.
in c++ in a sample directX program I see the variable LPDIRECT3D8. I want to know
1) how do you find out about this variable in help , I cant see this listed anywhere..what is it
2) variables types like this are being used as Pointers eg
LPDIRECT3D8 myone...
myone ->....
How can you do this as it isnt a pointer.
thanks
DirectX and many parts of windows commonly create pointer type aliases like this:
It's like they did this:
class IDirect3D8
{
};
typedef IDirect3D8 *LPDIRECT3D8;
so LPDIRECT3D8 is a "IDirect3D8 *". LP standing for Long Pointer, where the Long part is an old appendage from the days of 16 bit programming where pointers could be NEAR (16 bit), or FAR/LONG (32 bit)
You'll see LPCSTR all over windows which is a long pointer to a C string... or char *, and it's expecting the string to be null terminated.
It's like they did this:
class IDirect3D8
{
};
typedef IDirect3D8 *LPDIRECT3D8;
so LPDIRECT3D8 is a "IDirect3D8 *". LP standing for Long Pointer, where the Long part is an old appendage from the days of 16 bit programming where pointers could be NEAR (16 bit), or FAR/LONG (32 bit)
You'll see LPCSTR all over windows which is a long pointer to a C string... or char *, and it's expecting the string to be null terminated.
Sure it is.
Microsoft has the "wonderful" habit of typedef-ing pointers to LPCAPITOLSOMETHINGOROTHER. So anytime you see capitol LP at the front of a type, know that it's a pointer to the rest.
Generally google or msdn search is the best source of info for these sort of odd things.
Microsoft has the "wonderful" habit of typedef-ing pointers to LPCAPITOLSOMETHINGOROTHER. So anytime you see capitol LP at the front of a type, know that it's a pointer to the rest.
Generally google or msdn search is the best source of info for these sort of odd things.
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