c# winform窗口一直置頂顯示在桌面最上方或最底層的方法
一、
在最前面:
using System.Runtime.InteropServices;
在定義部分引入下面兩個(gè)函數(shù):
[DllImport( "user32 ")]
private static extern IntPtr FindWindow(string lpClassName,string lpWindowName);
[DllImport( "user32 ")]
private static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
在窗體On_Load事件中添加(Santos的代碼):
IntPtr hDeskTop=FindWindow( "Progman ", "Program Manager ");
SetParent(this.Handle,hDeskTop);
另一個(gè)方法可以修改桌面壁紙實(shí)現(xiàn)
經(jīng)測(cè)試,win2000--win2003 、xp下嵌入桌面,不支持vista和win7以上系統(tǒng)
二、
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; namespace ShowInDesk { publicpartialclass Form1 : Form { IntPtr hDesktop; publicconstint GW_CHILD =5; public Form1() { InitializeComponent(); this.hDesktop = GetDesktopHandle(DesktopLayer.Progman); EmbedDesktop(this, this.Handle, this.hDesktop); isMouseDown =false; } public IntPtr GetDesktopHandle(DesktopLayer layer) { //hWnd = new HandleRef(); HandleRef hWnd; IntPtr hDesktop =new IntPtr(); switch (layer) { case DesktopLayer.Progman: hDesktop = Win32Support.FindWindow("Progman", null);//第一層桌面 break; case DesktopLayer.SHELLDLL: hDesktop = Win32Support.FindWindow("Progman", null);//第一層桌面 hWnd =new HandleRef(this, hDesktop); hDesktop = Win32Support.GetWindow(hWnd, GW_CHILD);//第2層桌面 break; case DesktopLayer.FolderView: hDesktop = Win32Support.FindWindow("Progman", null);//第一層桌面 hWnd =new HandleRef(this, hDesktop); hDesktop = Win32Support.GetWindow(hWnd, GW_CHILD);//第2層桌面 hWnd =new HandleRef(this, hDesktop); hDesktop = Win32Support.GetWindow(hWnd, GW_CHILD);//第3層桌面 break; } return hDesktop; } publicvoid EmbedDesktop(Object embeddedWindow, IntPtr childWindow, IntPtr parentWindow) { Form window = (Form)embeddedWindow; HandleRef HWND_BOTTOM =new HandleRef(embeddedWindow, new IntPtr(1)); constint SWP_FRAMECHANGED =0x0020;//發(fā)送窗口大小改變消息 Win32Support.SetParent(childWindow, parentWindow); Win32Support.SetWindowPos(new HandleRef(window, childWindow), HWND_BOTTOM, 300, 300, window.Width, window.Height, SWP_FRAMECHANGED); } } }
2、
using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; namespace ShowInDesk { class Win32Support { [DllImport("user32.dll", CharSet = CharSet.Auto)] publicstaticextern IntPtr FindWindow(string className, string windowName); [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling =true)] publicstaticextern IntPtr GetWindow(HandleRef hWnd, int nCmd); [DllImport("user32.dll")] publicstaticextern IntPtr SetParent(IntPtr child, IntPtr parent); [DllImport("user32.dll", EntryPoint ="GetDCEx", CharSet = CharSet.Auto, ExactSpelling =true)] publicstaticextern IntPtr GetDCEx(IntPtr hWnd, IntPtr hrgnClip, int flags); [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling =true)] publicstaticexternbool SetWindowPos(HandleRef hWnd, HandleRef hWndInsertAfter, int x, int y, int cx, int cy, int flags); [DllImport("user32.dll")] publicstaticexternint ReleaseDC(IntPtr window, IntPtr handle); } }
3、
namespace ShowInDesk { publicenum DesktopLayer { Progman =0, SHELLDLL =1, FolderView =2 } }
三、
入桌面窗口最底層,并提供詳細(xì)的實(shí)現(xiàn)代碼供參考。
此類將窗體永遠(yuǎn)置于窗口最底層。
首先, 調(diào)用一些User32.dll的WinAPI函數(shù)。
internal class User32 { public const int SE_SHUTDOWN_PRIVILEGE =0x13; [DllImport("user32.dll")] public static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll")] public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent); [DllImport("user32.dll")] public static externbool SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags); }
然后, 在WinForm里面:
public MainForm() { InitializeComponent(); try { if (Environment.OSVersion.Version.Major <6) { base.SendToBack(); IntPtr hWndNewParent = User32.FindWindow("Progman", null); User32.SetParent(base.Handle, hWndNewParent); } else { User32.SetWindowPos(base.Handle, 1, 0, 0, 0, 0, User32.SE_SHUTDOWN_PRIVILEGE); } } catch (ApplicationException exx) { MessageBox.Show(this, exx.Message, "Pin to Desktop"); } } private void MainForm_Activated(object sender, EventArgs e) { if (Environment.OSVersion.Version.Major >=6) { User32.SetWindowPos(base.Handle, 1, 0, 0, 0, 0, User32.SE_SHUTDOWN_PRIVILEGE); } } private void MainForm_Paint(object sender, PaintEventArgs e) { if (Environment.OSVersion.Version.Major >=6) { User32.SetWindowPos(base.Handle, 1, 0, 0, 0, 0, User32.SE_SHUTDOWN_PRIVILEGE); } }
以上介紹的就是C#如何讓W(xué)inForm嵌入桌面窗口最底層,希望對(duì)你有所幫助。
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