cscの作法 その278

概要

cscの作法、調べてみた。
練習問題やってみた。

練習問題

SetWindowsHookEx使ってください。

方針

マウスやる。

サンプルコード

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;

class MyHook {
	[DllImport("user32.dll")]
	public static extern IntPtr CallNextHookEx(IntPtr hHook, int nCode, IntPtr wParam, IntPtr lParam);
	[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
	static extern IntPtr SetWindowsHookEx(int idHook, delegateHookCallback lpfn, IntPtr hMod, uint dwThreadId);
	[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
	[return: MarshalAs(UnmanagedType.Bool)]
	static extern bool UnhookWindowsHookEx(IntPtr hhk);
	[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
	static extern IntPtr GetModuleHandle(string lpModuleName);
	delegate IntPtr delegateHookCallback(int nCode, IntPtr wParam, IntPtr lParam);
	IntPtr hookPtr = IntPtr.Zero;
	public void Hook() {
		using (Process curProcess = Process.GetCurrentProcess())
		using (ProcessModule curModule = curProcess.MainModule)
		{
			hookPtr = SetWindowsHookEx(14, HookCallback, GetModuleHandle(curModule.ModuleName), 0);
		}
	}
	private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam) {
		if ((long) wParam == 0x0201) 
		{
			var p = Cursor.Position;
			Console.Write(p.X);
			Console.Write(", ");
			Console.WriteLine(p.Y);
		}
		return CallNextHookEx(hookPtr, nCode, wParam, lParam);
	}
	public void HookEnd() {
		UnhookWindowsHookEx(hookPtr);
		hookPtr = IntPtr.Zero;
	}
}
class SampleKeyHook {
	static void Main(string[] args) {
		MyHook myHook = new MyHook();
		myHook.Hook();
		Application.Run();
		myHook.HookEnd();
	}
}

以上。