c#實現Form表單始終在案頭最最上層顯示

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方法一：

//調用API[System.Runtime.InteropServices.DllImport("user32", CharSet = System.Runtime.InteropServices.CharSet.Auto, ExactSpelling = true)]public static extern IntPtr GetFocus(); //獲得本表單的控制代碼[System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetForegroundWindow")]public static extern bool SetFocus(IntPtr hWnd);//設定此表單為活動表單// 定義變數,控制代碼類型public IntPtr han;private void Form1_Load(object sender, EventArgs e){//在表單載入的時候給變數賦值,即將當前表單的控制代碼賦給變數han = this.Handle;}private void timer1_Tick(object sender, EventArgs e){// 載入一個定時器控制項,驗證當前WINDOWS控制代碼是否和本表單的控制代碼一樣,如果不一樣,則啟用本表單if (han != GetFocus()){SetFocus(han);}this.WindowState = FormWindowState.Normal;}

 

方法二：

[System.Runtime.InteropServices.DllImport("user32")]private static extern IntPtr GetActiveWindow();//擷取當前表單的活動狀態// 判斷當前視窗是否處於活動狀態的方法private bool ThisIsActive(){ return (GetActiveWindow() == this.Handle);}private void timer1_Tick(object sender, EventArgs e){if (!ThisIsActive()){this.Activate();}this.WindowState = FormWindowState.Normal;}

 

方法三

[DllImport("user32")]    private    static    extern    IntPtr    FindWindow(string    lpClassName,string    lpWindowName);         [DllImport("user32")]    private    static    extern    IntPtr    SetParent(IntPtr    hWndChild,    IntPtr    hWndNewParent);         //在表單On_Load事件中添加（Santos的代碼）：    IntPtr    hDeskTop=FindWindow("Progman",    "Program    Manager");    SetParent(this.Handle,hDeskTop);