Win32提供了SetForegroundWindow办法能够将利用设置到前台并激活，然而在某些场景下，只调用该接口会返回0，即设置失败。比方如下场景：
以后前台利用为一个全屏的利用，非前台利用的过程应用Process.Start()办法启动截图工具，尝试应用SetForegroundWindow()将窗口设置到前台，此时会概率性设置失败。
尝试了多种办法后，最终应用如下办法解决了该问题：
public static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);public static readonly IntPtr HWND_NOTOPMOST = new IntPtr(-2);public const int SWP_NOSIZE = 0x1;public const int SWP_NOMOVE = 0x2;[DllImport("user32.dll")]public static extern IntPtr GetForegroundWindow();[DllImport("user32.dll")]public static extern bool SetForegroundWindow(IntPtr hwnd);[DllImport("user32.dll")]public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);[DllImport("user32.dll")]public static extern bool SetWindowPos(IntPtr hwnd, IntPtr hWndInsertAfter, int x, int y, int cx, int cy, uint uFlags);public void StartSnippingTool(){ if (!Envronment.Is64BitProcess) { Process.Start(@"C:\Windows\sysnative\SnippingTool.exe"); } else { Process.Start(@"C:\Windows\system32\SnippingTool.exe"); } Thread.Sleep(500); IntPtr snippingToolHandle = FindWindow("Microsoft-Windows-SnipperToolbar", "截图工具"); if (snippingToolHandle != IntPtr.Zero) { SetForegroundWindowCustom(snippingToolHandle); }}private void SetForegroundWindowCustom(IntPtr hwnd){ IntPtr currentWindow = GetForegroundWindow(); if (currentWindow == hwnd) { Console.WriteLine("利用已在顶层"); return; } SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE|SWP_NOMOVE); SetWindowPos(hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOSIZE|SWP_NOMOVE); bool result = SetForegroundWindow(hwnd); if (result) { Console.WriteLine("置顶利用胜利"); } else { Console.WriteLine("置顶利用失败"); }}