你能在XNA中打开NumLock吗
本文关键字:NumLock XNA | 更新日期: 2023-09-27 18:27:02
你能在XNA中打开NumLock吗?
(我正在寻找XNA数字锁定影响输入的解决方案。)
您必须p/InvokeSendInput。这在一定程度上涉及到:
void ToggleNumLock() {
var inputSequence = new INPUT[2]; // one keydown, one keyup = one keypress
inputSequence[0].type = 1; // type Keyboard
inputSequence[1].type = 1;
inputSequence[0].U.wVk = 0x90; // keycode for NumLock
inputSequence[1].U.wVk = 0x90;
inputSequence[1].U.dwFlags |= KEYEVENTF.KEYUP;
var rv = SendInput(2, inputSequence, INPUT.Size);
if (rv != 2)
{
throw new InvalidOperationException("Call to SendInput failed");
}
}
void EnsureNumLockIsOn() {
bool numLock = (((ushort)GetKeyState(0x90)) & 0xffff) != 0;
if (!numLock) {
ToggleNumLock();
}
}
以下是相关定义:
using System.Runtime.InteropServices;
[DllImport("user32.dll")]
static extern uint SendInput(UInt32 nInputs,
INPUT[] pInputs,
int cbSize);
[DllImport("user32.dll")]
static extern short GetKeyState(int keyCode);
[StructLayout(LayoutKind.Sequential)]
public struct INPUT
{
internal uint type;
internal KEYBDINPUT U;
internal static int Size
{
get { return Marshal.SizeOf(typeof(INPUT)); }
}
}
[StructLayout(LayoutKind.Sequential)]
internal struct KEYBDINPUT
{
internal short wVk;
internal short wScan;
internal KEYEVENTF dwFlags;
internal int time;
internal UIntPtr dwExtraInfo;
uint unused1;
uint unused2;
}
[Flags]
internal enum KEYEVENTF : uint
{
EXTENDEDKEY = 0x0001,
KEYUP = 0x0002,
SCANCODE = 0x0008,
UNICODE = 0x0004
}
我不知道这是否是你想要的,但我找到了这篇文章。
为了知道是否大写锁定、数字锁定或滚动锁定键打开时,我们需要通过调用非托管函数。
由于我们将调用一个非托管函数,因此以下使用语句按顺序排列:
using System.Runtime.InteropServices;
以下是我们将要使用的非托管函数的定义使用,GetKeyState():
// An unmanaged function that retrieves the states of each key
[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
public static extern short GetKeyState(int keyCode);
// Get they key state and store it as bool
bool NumLock = (((ushort)GetKeyState(0x90)) & 0xffff) != 0;