DirectInput arrow keys

What are the possible reasons why my directinput code can recognise normal keys like A-Z but it just doesnt recognise arrow keys like DIK_UP,DIK_LEFT,DIK_RIGHT,DIK_DOWN.

change the keystate array to a 'char' instead of 'unsigned char' array.

I usually do it with:

Code:

---

BYTE tec[256];
m_keyboarddev->GetDeviceState(256,&tec);
if(tec[DIK_UP] & 0x80) {/*is the up arrow key*/}
/*do similar with the other keys*/

---

the 'keyboarddev' should be your LPDIRECTINPUTDEVICE
Niara

Code:

---

class Keyboard :
        public Controller
{
public:
        Keyboard(LPDIRECTINPUT8 pDI, HWND hwnd);
        ~Keyboard(void);
        bool shutdown();
        bool read();
        void clear();
        bool buttonDown(char key){ return (m_keys[key] & 0x80) ? true : false; }
    bool buttonUp(char key){ return (m_keys[key] & 0x80) ? false : true; }
private:
        char m_keys[256];
        LPDIRECTINPUTDEVICE8  m_pDIDev;

};

---

This is my code. It just can't recognize arrow keys, home,end, delete,page up and page down. Maybe there are more.

A little observation, sometimes the easyest part is missed: you should call the button down function, hope that it won't execute for itself :).
I do the next: first process the keyboard and mouse operations, then render all; it is in the game's loop. something like:

Code:

---

while(msg.message!=WM_QUIT)
    {
    fMessage=PeekMessage(&msg,NULL,0U,0U,PM_REMOVE);
    if(fMessage)
        {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
        }
    else
        {
        yourkeyboardclasspointer->procKeyb();
        Render();
        }
    }

---

and the procKey() should be (the same as before):

Code:

---

void yourkeyboardclass::procKeyb()
{
BYTE tec[256];
m_keyboarddev->GetDeviceState(256,&tec);
if(tec[DIK_UP] & 0x80) {/*is the up arrow key*/}
/*do similar with the other keys*/
}

---

if you call that function from the WM_ messages I think that will get a little delay. it works for me.
Niara

I had almost the exact same problem a couple days ago. You need an array of unsigned chars (and make sure the function also takes an unsigned char)

Thanks guys.

I forgot to mention that I did call the function in my game loop.

And indeed, it is the unsigned char problem.