[DllImport("user32.dll")]
public static extern unit SendInput(unit nInput,ref IInput[] pInputs int cbSize);public interface IInput {}public struct MouseInput : IInput {}public struct KeyBoardInput : IInput {}public struct HardWareInput : IInput {}1、声明中的第二个参数这样写行不行
2、第三个参数要求提供输入INPUT结构的大小,但是VS.net 2005中sizeof关键字不允许以结构为参数,根据MSDN所说,Marshal.SizeOf返回的值是已封送处理类型后的值,测试证明用这个函数确实不行。
3、能不能在一个IInput数组中同时加入两种或以上的操作(例如一个鼠标移动、一个键盘按键按下和一个键盘弹起的操作序列),这个问题貌似还是如何取得结构大小的问题,不过更复杂点。
还有,pInputs没有Length属性,这个属性应该怎么定义呢?
public static extern UInt32 SendInput(UInt32 nInputs, ref INPUT pInputs, int cbSize); [StructLayout(LayoutKind.Explicit)]
public struct INPUT
{
[FieldOffset(0)]
public Int32 type;
[FieldOffset(4)]
public KEYBDINPUT ki;
[FieldOffset(4)]
public MOUSEINPUT mi;
[FieldOffset(4)]
public HARDWAREINPUT hi;
} [StructLayout(LayoutKind.Sequential)]
public struct MOUSEINPUT
{
public Int32 dx;
public Int32 dy;
public Int32 mouseData;
public Int32 dwFlags;
public Int32 time;
public IntPtr dwExtraInfo;
}
[StructLayout(LayoutKind.Sequential)]
public struct KEYBDINPUT
{
public Int16 wVk;
public Int16 wScan;
public Int32 dwFlags;
public Int32 time;
public IntPtr dwExtraInfo;
}
[StructLayout(LayoutKind.Sequential)]
public struct HARDWAREINPUT
{
public Int32 uMsg;
public Int16 wParamL;
public Int16 wParamH;
}
public const int INPUT_KEYBOARD = 1;
public const int KEYEVENTF_KEYUP = 0x0002; private void button1_Click(object sender, EventArgs e)
{
INPUT inDown = new INPUT(); inDown.type = INPUT_KEYBOARD;
inDown.ki.wVk = (int)Keys.A;
inDown.ki.dwFlags = KEYEVENTF_KEYUP; this.Text = SendInput(1, ref inDown, Marshal.SizeOf(inDown)).ToString(); }