.NET 中 对窗口中某一控件全屏显示的方法二则

示例一：

        采用API的形式调用，同时将API的调用封装成一个库，废话不说，直接上代码：

using System;using System.Collections.Generic;using System.Text;using System.Runtime.InteropServices;using System.Windows.Forms;namespace FullScreenActiveX{    public class FullScreenHelper    {        bool m_bFullScreen = false;        IntPtr m_OldWndParent = IntPtr.Zero;        WINDOWPLACEMENT m_OldWndPlacement = new WINDOWPLACEMENT();        Control m_control = null;        public FullScreenHelper(Control c)        {            m_control = c;        }        [DllImport("User32.dll")]        static extern bool LockWindowUpdate(IntPtr hWndLock);        struct POINT        {            int x;            int y;        } ;        struct RECT        {            public int left;            public int top;            public int right;            public int bottom;        } ;        [DllImport("User32.dll")]        static extern bool SetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);        [DllImport("User32.dll")]        static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);        [DllImport("User32.dll")]        static extern bool SetForegroundWindow(IntPtr hWnd);        [DllImport("User32.dll")]        static extern IntPtr GetDesktopWindow();        [DllImport("User32.dll")]        static extern bool GetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);        [DllImport("User32.dll")]        static extern int GetSystemMetrics(int nIndex);        public void FullScreen()        {            if (m_bFullScreen)            {                LockWindowUpdate(m_control.Handle);                SetParent(m_control.Handle, m_OldWndParent);                SetWindowPlacement(m_control.Handle, ref m_OldWndPlacement);                SetForegroundWindow(m_OldWndParent);                LockWindowUpdate(IntPtr.Zero);            }            else            {                GetWindowPlacement(m_control.Handle, ref m_OldWndPlacement);                int nScreenWidth = GetSystemMetrics(0);                int nScreenHeight = GetSystemMetrics(1);                m_OldWndParent = m_control.Parent.Handle;                SetParent(m_control.Handle, GetDesktopWindow());                WINDOWPLACEMENT wp1 = new WINDOWPLACEMENT();                wp1.length = (uint)Marshal.SizeOf(wp1);                wp1.showCmd = 1;                wp1.rcNormalPosition.left = 0;                wp1.rcNormalPosition.top = 0;                wp1.rcNormalPosition.right = nScreenWidth;                wp1.rcNormalPosition.bottom = nScreenHeight;                SetWindowPlacement(m_control.Handle, ref wp1);                SetForegroundWindow(GetDesktopWindow());                SetForegroundWindow(m_control.Handle);            }            m_bFullScreen = !m_bFullScreen;        }        struct WINDOWPLACEMENT        {            public uint length;            public uint flags;            public uint showCmd;            public POINT ptMinPosition;            public POINT ptMaxPosition;            public RECT rcNormalPosition;        } ;    }}

示例二，根据C#中的类，查看系统中有几个显示器，然后，将控件的大小和定位设置到相应的尺寸，该功能可以满足多显示器下的使用

private void FillScreenDisplay(Control control, bool fill){if(fill){control.Dock = DockStyle.None;control.Left = 0;control.Top = 0;control.Width = Screen.PrimaryScreen.Bounds.Width;control.Height = Screen.PrimaryScreen.Bounds.Height;SetParent(this[pos].Handle,IntPtr.Zero);base.Parent.Hide();}else{SetParent(control,this.Handle);base.Parent.Show();}}