我有一个外部程序,当鼠标在外部程序窗体上时,他会正常运行,当鼠标移到别的窗体时,他会停止运行;我想通过C#来解决这个问题
时间: 2024-01-19 12:01:59 浏览: 26
你可以通过使用 Windows API 来实现这个功能。具体来说,你可以使用 SetWindowsHookEx 函数来安装一个全局的鼠标钩子,然后在钩子回调函数中检测当前鼠标所在的窗口句柄,如果不是你的外部程序的窗口句柄,就发送一个停止命令给你的外部程序,否则就发送一个继续运行的命令。
以下是一个简单的代码示例:
```csharp
using System;
using System.Runtime.InteropServices;
class Program
{
private static IntPtr _hookId = IntPtr.Zero;
static void Main(string[] args)
{
// 安装鼠标钩子
_hookId = SetHook(HookCallback);
// 等待用户按下 Enter 键退出程序
Console.ReadLine();
// 卸载鼠标钩子
UnhookWindowsHookEx(_hookId);
}
private static IntPtr SetHook(HookProc proc)
{
using (ProcessModule module = Process.GetCurrentProcess().MainModule)
{
return SetWindowsHookEx(WH_MOUSE_LL, proc,
GetModuleHandle(module.ModuleName), 0);
}
}
private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0 && (int)wParam == WM_MOUSEMOVE)
{
// 获取当前鼠标所在的窗口句柄
IntPtr hWnd = WindowFromPoint(Marshal.ReadInt32(lParam));
// 如果不是外部程序的窗口句柄,就发送停止命令
if (hWnd != externalProgramHandle)
{
SendMessage(externalProgramHandle, WM_STOP, IntPtr.Zero, IntPtr.Zero);
}
else
{
SendMessage(externalProgramHandle, WM_CONTINUE, IntPtr.Zero, IntPtr.Zero);
}
}
return CallNextHookEx(_hookId, nCode, wParam, lParam);
}
private delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam);
private const int WH_MOUSE_LL = 14;
private const int WM_MOUSEMOVE = 0x200;
private const int WM_STOP = 0x1000;
private const int WM_CONTINUE = 0x1001;
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hMod, uint dwThreadId);
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool UnhookWindowsHookEx(IntPtr hhk);
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr WindowFromPoint(int xPoint);
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr GetModuleHandle(string lpModuleName);
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
}
```
注意,上述代码中的 `externalProgramHandle` 变量需要替换为你的外部程序的窗口句柄。另外,你还需要根据你的实际需求修改发送的停止和继续命令的消息代码。