My debugger gives me this information:

&d3ddev = 0x00993ab0
&d3dpp = 0x0099abc
&v_buffer = 0x00993ab8
D3DDEVTYPE_HAL = 1
D3DPOOL_MANAGED = 1
d3d = 0x00a90800
d3ddev = 0x00000000
hWnd = 0x00000000
this = 0x00993ab0

I guess that 0x00000000 means null? How can my d3dd3d and hWnd be null depending on the code in my GetInput method in Input.cpp?

Oh, sorry, I mean the CheckInput method.

Yes, when I comment/erase everything in the CheckInput method, the game builds and runs fine. If I add the code back to the CheckInput method, it crashes on build again. It's even more strange that I get a graphics error when we clearly see that the problem is in the input class (no graphics code is placed in the Input class). Any ideas?

I tried using the basic windows message for input before, but it didn't work for some buttons, like the Esc button, and then I was recommended to use the Raw Input

I've re-written the Input.cpp from the beginning and now my game manages to detect button presses This is my current code:


Input.cpp
[source lang="cpp"]
#include <Windows.h>
#include "Input.h"
#include "Main.h"


Input::Input()
{
RAWINPUTDEVICE rid[1];

rid[0].usUsagePage = 1;
rid[0].usUsage = 6;
rid[0].dwFlags = 0;
rid[0].hwndTarget = NULL;

if (!RegisterRawInputDevices(rid, 1, sizeof(RAWINPUTDEVICE)))
{
MessageBox(NULL, L"Failed to register input device", NULL, NULL);
}

buffer = new BYTE[40];
}


Input::~Input(void)
{
}


void Input::Read(LPARAM lParam)
{
if (GetRawInputData((HRAWINPUT)lParam, RID_INPUT, NULL, &buffer_size, sizeof(RAWINPUTHEADER)) < 0)
{
MessageBox(NULL, L"Failed to receive input data", NULL, NULL);
}

if (buffer_size > sizeof(buffer))
{
buffer = new BYTE[buffer_size];
}

if (GetRawInputData((HRAWINPUT)lParam, RID_INPUT, (LPVOID)buffer, &buffer_size, sizeof(RAWINPUTHEADER)) < 0)
{
MessageBox(NULL, L"Failed to receive input data", NULL, NULL);
}

raw = (RAWINPUT*)buffer;

if (raw->header.dwType == RIM_TYPEKEYBOARD)
{
key_code = raw->data.keyboard.VKey;

switch (key_code)
{
case VK_LEFT: key_down.left = true; break;
case VK_RIGHT: key_down.right = true; break;
}
}
}
[/source]


I tested to move my player around on the x-axis and it worked. The only problem is that if I press the right arrow button once, the player will continue moving to the right untill I press another key. How can I do so the player will only move to the right when I hold down the right arrow key, and stop when I release it? It should also ignore that other buttons is pressed? Any ideas?

Also, is there anyway to log/alert fails without using the messagebox? The messagebox doesn't work so well as it shows up behind my game window (fullscreen)...

sizeof() is a compile time construct. You cannot use it to determine the size of a dynamically allocated array. The result of the expression is the sizeof of the pointer variable. Instead, consider using std::vector<char> as your buffer. It won't leak, unlike your current code.

Your current code sets "left" or "right" to "true" when any activity occurs on the keyboard. Instead you should inspect the members of the RAWKEYBOARD structure, and determine if the key has been pressed or released.

Another option is to use GetKeyboardState() or GetASyncKeyState(), rather than using raw input.

Didn't understand the thing with "dynamically allocated array". Do you mind giving an example?

I've tested to use the "flag" member in RAWKEYBOARD, this however doesn't work (no crash, but it returns false)
[source lang="cpp"]
bool Input::KeyDown(USHORT key)
{
raw = (RAWINPUT*)buffer;

if (raw->header.dwType == RIM_TYPEKEYBOARD)
{
key_code = raw->data.keyboard.VKey;
}

if (raw->data.keyboard.VKey == key)
{
if (raw->data.keyboard.Flags == RI_KEY_MAKE)
{
MessageBox(NULL, L"PRESS", NULL, NULL);

return true;
}
}

return false;
}
[/source]


How should I do?

Thanks for helping

Ok, I've changed it to this:
[source lang="cpp"]
bool Input::KeyDown(USHORT key)
{
raw = (RAWINPUT*)buffer;

if (raw->header.dwType == RIM_TYPEKEYBOARD)
{
key_code = raw->data.keyboard.VKey;
}

if (raw->data.keyboard.VKey == key)
{
if ((raw->data.keyboard.Flags & RI_KEY_MAKE) == RI_KEY_MAKE)
{
return true;
}
}

return false;
}
[/source]

It returns true when I press a key, but it still continues returning true even if I've released the button. It only stops if I press another button. How should I solve this?