Direct X and VB.Net...

[Psyrus]

Has anyone tried to write a VB.Net game yet?

I'm getting this error:

"Cast from type 'IntPtr' to type 'Integer' is not valid"

Here is where the error is happening:

g_D3DDevice = g_D3D.CreateDevice(D3DADAPTER_DEFAULT, DevType, hWnd, DevBehaviorFlags, g_D3DWindow)

It's hWnd that's causing the problem. I am passing picturebox.Handle as the hWnd parameter. If I change hWnd to hWnd.ToInt32 within the function I get a similar type of error:

"Specified cast is not valid"

How does one use windows handles with Directx and .Net? I can't find any documentation on the MS sites.

[Sastraxi]

If I'm not mistaken, the .Handle is equivalent to the .hDC of a control, not the .hWnd. Look for something like Window, Window Handle, etc.

[Psyrus]

.Handle returns a System.IntPtr . Which, I thought, was the same. I tried using hWnd.ToInt32 but then I get an "Invalid cast error". I'm still searching around for an answer but have been coming up short. I hoping that someone here has run into it and found a work around.

Thanks for your reply,

[Sastraxi]

Well that's just the thing - I've never used VB.NET, so everything I say here is just out of my mind (which, I must add, you can't trust. Keep that in mind ).

Oh, looking at your first post it looks like you're trying to cast a pointer to an integer. What you'll need to do is read the value of the pointer, which is already an integer. In C++, we do it like this, but I don't know about VB.NET...

*pointer;

[Psyrus]

I believe that's what the .ToInt32 returns. In break mode it shows a number where as the hWnd by itself shows an object of system.IntPtr .

I must be out of my mind to try something like this LOL. I can't find any documentation on it anywhere. Kinda just feeling my way through it.

Thanks for your input.

[Sastraxi]

Maybe try signed/unsigned integers, and if that doesn't work, try Int16, because Int32 = Long and Int16 = Integer.

[Psyrus]

Believe it or not I found the problem out while trying the same thing in VB6.

Calling hWnd.ToInt32 was correct, the problem was that I declared g_D3DDevice as DxVBLibA.Direct3D8 and not as DxVBLibA.Direct3DDevice8 like I should have...oops


Thanks again,