wio
88 lines
2.4 KiB
C#
88 lines
2.4 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using System.Collections;
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namespace HSI_SEVENOCEAN_EF1_CsTest
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{
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class User32Api
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{
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private static readonly Hashtable ProcessWnd = null;
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public delegate bool Wndenumproc(IntPtr hwnd, uint lParam);
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static User32Api()
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{
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if (ProcessWnd == null)
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{
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ProcessWnd = new Hashtable();
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}
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}
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[DllImport("user32.dll", EntryPoint = "EnumWindows", SetLastError = true)]
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public static extern bool EnumWindows(Wndenumproc lpEnumFunc, uint lParam);
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[DllImport("user32.dll", EntryPoint = "GetParent", SetLastError = true)]
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public static extern IntPtr GetParent(IntPtr hWnd);
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[DllImport("user32.dll", EntryPoint = "GetWindowThreadProcessId")]
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public static extern uint GetWindowThreadProcessId(IntPtr hWnd, ref uint lpdwProcessId);
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[DllImport("user32.dll", EntryPoint = "IsWindow")]
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public static extern bool IsWindow(IntPtr hWnd);
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[DllImport("kernel32.dll", EntryPoint = "SetLastError")]
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public static extern void SetLastError(uint dwErrCode);
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public static IntPtr GetCurrentWindowHandle()
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{
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IntPtr ptrWnd = IntPtr.Zero;
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uint uiPid = (uint)System.Diagnostics.Process.GetCurrentProcess().Id; // 当前进程 ID
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object objWnd = ProcessWnd[uiPid];
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if (objWnd != null)
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{
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ptrWnd = (IntPtr)objWnd;
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if (ptrWnd != IntPtr.Zero && IsWindow(ptrWnd)) // 从缓存中获取句柄
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{
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return ptrWnd;
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}
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else
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{
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ptrWnd = IntPtr.Zero;
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}
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}
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bool bResult = EnumWindows(new Wndenumproc(EnumWindowsProc), uiPid);
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// 枚举窗口返回 false 并且没有错误号时表明获取成功
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if (!bResult && Marshal.GetLastWin32Error() == 0)
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{
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objWnd = ProcessWnd[uiPid];
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if (objWnd != null)
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{
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ptrWnd = (IntPtr)objWnd;
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}
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}
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return ptrWnd;
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}
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private static bool EnumWindowsProc(IntPtr hwnd, uint lParam)
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{
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uint uiPid = 0;
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if (GetParent(hwnd) == IntPtr.Zero)
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{
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GetWindowThreadProcessId(hwnd, ref uiPid);
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if (uiPid == lParam) // 找到进程对应的主窗口句柄
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{
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ProcessWnd[uiPid] = hwnd; // 把句柄缓存起来
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SetLastError(0); // 设置无错误
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return false; // 返回 false 以终止枚举窗口
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}
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}
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return true;
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}
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}
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} |