wpf C#鼠标Hook
时间: 2023-10-07 11:10:34 浏览: 72
在WPF中,可以使用Win32 API来实现鼠标Hook。以下是一个简单的示例,可以Hook鼠标的左键和右键点击事件:
首先,需要引入以下命名空间:
```csharp
using System.Runtime.InteropServices;
using System.Windows.Input;
```
然后定义以下结构体和枚举:
```csharp
[StructLayout(LayoutKind.Sequential)]
public struct POINT
{
public int X;
public int Y;
}
public enum MouseMessages
{
WM_LBUTTONDOWN = 0x0201,
WM_LBUTTONUP = 0x0202,
WM_RBUTTONDOWN = 0x0204,
WM_RBUTTONUP = 0x0205
}
```
接下来,定义以下方法:
```csharp
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool GetCursorPos(out POINT lpPoint);
[DllImport("user32.dll")]
private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool UnhookWindowsHookEx(IntPtr hhk);
[DllImport("user32.dll")]
private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
```
最后,定义以下委托和字段:
```csharp
private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);
private const int WH_MOUSE_LL = 14;
private const int WM_MOUSEMOVE = 0x0200;
private static LowLevelMouseProc _proc = HookCallback;
private static IntPtr _hookID = IntPtr.Zero;
```
现在可以实现Hook的回调函数:
```csharp
private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0 && (MouseMessages)wParam == MouseMessages.WM_LBUTTONDOWN)
{
// 左键点击事件
POINT point;
if (GetCursorPos(out point))
{
// 获取鼠标位置
var wpfPoint = new Point(point.X, point.Y);
var element = Mouse.DirectlyOver as UIElement;
if (element != null)
{
// 触发鼠标左键点击事件
element.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseLeftButtonDownEvent,
Source = element,
OriginalSource = element,
ClickCount = 1,
Timestamp = 0,
MouseButtonState = MouseButtonState.Pressed,
StylusDevice = null,
GetPosition = p => wpfPoint,
});
}
}
}
else if (nCode >= 0 && (MouseMessages)wParam == MouseMessages.WM_RBUTTONDOWN)
{
// 右键点击事件
POINT point;
if (GetCursorPos(out point))
{
// 获取鼠标位置
var wpfPoint = new Point(point.X, point.Y);
var element = Mouse.DirectlyOver as UIElement;
if (element != null)
{
// 触发鼠标右键点击事件
element.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Right)
{
RoutedEvent = UIElement.MouseRightButtonDownEvent,
Source = element,
OriginalSource = element,
ClickCount = 1,
Timestamp = 0,
MouseButtonState = MouseButtonState.Pressed,
StylusDevice = null,
GetPosition = p => wpfPoint,
});
}
}
}
return CallNextHookEx(_hookID, nCode, wParam, lParam);
}
```
最后,在需要Hook鼠标事件的地方调用以下代码即可:
```csharp
_hookID = SetWindowsHookEx(WH_MOUSE_LL, _proc, IntPtr.Zero, 0);
```
同时,在程序退出时,需要取消Hook:
```csharp
UnhookWindowsHookEx(_hookID);
```