C# DirectInput SendInput 不影响游戏

Question

我需要一些有关 DirectInput 的帮助，我会告诉您我正在尝试做什么。当我只按一个键时，我想做我的程序将组合键发送到游戏。例如:我将按“r”，它会按“1”、“3”、“2”、“4”键。我从这里找到了一些代码。但它们并没有完全起作用。

    public static void Send_Key_Hold(short Keycode)
    {
        INPUT[] InputData = new INPUT[1];
        InputData[0].type = 1;
        InputData[0].ki.wScan = Keycode;
        InputData[0].ki.dwFlags = (int)(KEYEVENTF_SCANCODE);

        SendInput(1, InputData, Marshal.SizeOf(InputData[0]));
    }
    public static void Send_Key_Release(short Keycode)
    {
        INPUT[] InputData = new INPUT[1];
        InputData[0].type = 1;
        InputData[0].ki.wScan = Keycode;
        InputData[0].ki.dwFlags = (int)(KEYEVENTF_KEYUP | KEYEVENTF_SCANCODE);

        SendInput(1, InputData, Marshal.SizeOf(InputData[0]));
    }

这是我的代码和我的问题:当我仅使用 Send_Key_Hold 时，它会按下游戏中的一个键，而其他组合键未按下，因为我认为第一个键被按住。当我同时使用 Send_Key_Hold 和 Send_Key_Release 时，它​​不会按下游戏中的任何按钮。但是在桌面上(我指的是任何其他应用程序而不是游戏)它按下了键。

Answer 1

我在网上找到了这个例子。当我尝试做与您现在正在尝试的相同的事情时，我自己对其进行了测试。

[Flags]
private enum InputType
{
    Mouse = 0,
    Keyboard = 1,
    Hardware = 2
}

[Flags]
private enum KeyEventF
{
    KeyDown = 0x0000,
    ExtendedKey = 0x0001,
    KeyUp = 0x0002,
    Unicode = 0x0004,
    Scancode = 0x0008,
}

[DllImport("user32.dll", SetLastError = true)]
private static extern uint SendInput(uint nInputs, Input[] pInputs, int cbSize);

[DllImport("user32.dll")]
private static extern IntPtr GetMessageExtraInfo();

public static void SendKey(ushort key)
{
    Input[] inputs =
    {
        new Input
        {
            type = (int) InputType.Keyboard,
            u = new InputUnion
            {
                ki = new KeyboardInput
                {
                    wVk = 0,
                    wScan = key,
                    dwFlags = (uint) (KeyEventF.KeyDown | KeyEventF.Scancode),
                    dwExtraInfo = GetMessageExtraInfo()
                }
            }
        }
    };

    SendInput((uint) inputs.Length, inputs, Marshal.SizeOf(typeof (Input)));
}

private struct Input
{
    public int type;
    public InputUnion u;
}

[StructLayout(LayoutKind.Explicit)]
private struct InputUnion
{
    [FieldOffset(0)] public readonly MouseInput mi;
    [FieldOffset(0)] public KeyboardInput ki;
    [FieldOffset(0)] public readonly HardwareInput hi;
}

[StructLayout(LayoutKind.Sequential)]
private struct MouseInput
{
    public readonly int dx;
    public readonly int dy;
    public readonly uint mouseData;
    public readonly uint dwFlags;
    public readonly uint time;
    public readonly IntPtr dwExtraInfo;
}

[StructLayout(LayoutKind.Sequential)]
private struct KeyboardInput
{
    public ushort wVk;
    public ushort wScan;
    public uint dwFlags;
    public readonly uint time;
    public IntPtr dwExtraInfo;
}

[StructLayout(LayoutKind.Sequential)]
private struct HardwareInput
{
    public readonly uint uMsg;
    public readonly ushort wParamL;
    public readonly ushort wParamH;
}

现在使用 SendKey(0x14) 将您的 T 键发送到事件窗口(或游戏)。

注意:您需要将 KeyEventF.Scancode 作为标志，否则 wScan 属性将被忽略!