How to get the key state via a scancode (not virtual keycode)?

Is there 开发者_StackOverflow中文版anyway to get the state of a keyboard key (is it down or up) using just a scancode? I can't find any function in win32 for this. Anyone know any way to achieve this?

p.s. I need the actual state of the keyboard not the state derived from windows messages like GetKeyState returns.

You'll have to use the MapVirtualKey function, using MAPVK_VSC_TO_VK as the mode, and pass the output to GetKeyState or GetKeyboardState, as none of the WinAPI key functions directly use scan codes

Perhaps you are looking for GetAsyncKeyState. It is referenced from the GetKeyState documentation and appears to return what you desire.

MapVirtualKey doesn't translate a lot of keys, so I came up with this switch:

int main() {
    directinput = new DirectInput();
    directinput->init();
    while(1) {
        int ret = directinput->ReadKeyboard();
        if(!ret)
            continue;

        int keys_pressed = 0;
        for(int i = 0; i < 256; i++) {
            if((directinput->m_keyboardState[i] & 128) == 0)
                continue;
            unsigned char scancode = i;
            UINT key = MapVirtualKey(scancode, MAPVK_VSC_TO_VK_EX);
            //UINT key = MapVirtualKeyEx(scancode, MAPVK_VSC_TO_VK, GetKeyboardLayout(0)); // same as MapVirtualKey

            switch(scancode) {
                case 203: key = VK_LEFT; break;
                case 205: key = VK_RIGHT; break;
                case 200: key = VK_UP; break;
                case 208: key = VK_DOWN; break;
                case 211: key = VK_DELETE; break;
                case 207: key = VK_END; break;
                case 199: key = VK_HOME; break; // pos1
                case 201: key = VK_PRIOR; break; // page up
                case 209: key = VK_NEXT; break;  // page down
                case 210: key = VK_INSERT; break;
                case 184: key = VK_RMENU; break; // right alt
                case 157: key = VK_RCONTROL; break; // right control
                case 219: key = VK_LWIN; break; // left win
                case 220: key = VK_RWIN; break; // right win
                case 156: key = VK_RETURN; break; // right enter
                case 181: key = VK_DIVIDE; break; // numpad divide
                case 221: key = VK_APPS; break; // menu key
            }

            printf("keys_pressed=%d scancode=%d/0x%x key=%d char=%c hex=0x%x\n", keys_pressed, scancode, scancode, key, key, key);
            keys_pressed++;
        }

        Sleep((int)(1000.0 / 60.0));
    }
    return 0;
}