使用winform窗口程序 注册鼠标RegisterRawInputDevices 获取鼠标坐标
时间: 2024-09-27 14:13:31 浏览: 25
在Windows Forms应用程序中,如果你想注册并监听鼠标事件,特别是为了获取精确的鼠标坐标,可以使用`RegisterRawInputDevices`函数结合.NET Framework中的`System.Windows.Forms.Input`命名空间。`RegisterRawInputDevices`是Windows API的一部分,它允许高级的应用程序接收来自硬件设备(包括鼠标)的原始输入数据。
以下是一个简单的示例,展示了如何使用C#编写代码来注册鼠标并获取其坐标:
```csharp
using System;
using System.Runtime.InteropServices;
public class RawMousePositionForm : Form
{
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr RegisterRawInputDevices(IntPtr hDevice, int nNumDevices, IntPtr p devices);
[DllImport("user32.dll")]
private static extern short GetRawInputData(IntPtr hDevice, uint dwCommand, ref RAWINPUT riw, int cbSize, uint lpData);
public struct RAWINPUT
{
// ...其他字段...
public uint usUsagePage;
public uint usUsage;
public uint wFlags;
public IntPtr dwExtraInfo;
}
public override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
// 注册鼠标设备
RAWINPUT mouseDevice = new RAWINPUT();
mouseDevice.usUsagePage = 0x00; // 鼠标
mouseDevice.usUsage = 0x02; // 左键
mouseDevice.wFlags = 0x0001; // RIM_INPUTAVAILABLE
mouseDevice.dwExtraInfo = Marshal.AllocHGlobal(sizeof(IntPtr));
// 注册设备并获取初始位置
int result = RegisterRawInputDevices(Marshal.GetNativeInstancePointer(mouseDevice), 1, Marshal.GetNativeInstancePointer(mouseDevice));
if (result == 0)
{
IntPtr extraInfo = (IntPtr)mouseDevice.dwExtraInfo;
byte[] data = new byte[sizeof(RAWINPUTHEADER)];
GetRawInputData(extraInfo, RID_INPUT, ref mouseDevice, data.Length, data);
int x = mouseDevice.lLastX;
int y = mouseDevice.lLastY;
Console.WriteLine($"初始鼠标位置: ({x}, {y})");
}
}
}
// 程序入口点
class Program
{
static void Main(string[] args)
{
Application.Run(new RawMousePositionForm());
}
}
```
这个例子会在窗体创建时注册鼠标设备,并在每次有新的鼠标输入时打印出坐标。注意这只是一个基础示例,实际应用中可能还需要处理解压和解析RAWINPUT数据,以及注册设备的取消等。
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