方法一
//调用API
[System.Runtime.InteropServices.DllImport("user32", CharSet = System.Runtime.InteropServices.CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetFocus(); //获得本窗体的句柄
[System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetForegroundWindow")]
public static extern bool SetFocus(IntPtr hWnd);//设置此窗体为活动窗体
// 定义变量,句柄类型
public IntPtr han;
private void Form1_Load(object sender, EventArgs e){
//在窗体加载的时候给变量赋值,即将当前窗体的句柄赋给变量
han = this.Handle;
}
private void timer1_Tick(object sender, EventArgs e){
// 加载一个定时器控件,验证当前WINDOWS句柄是否和本窗体的句柄一样,如果不一样,则激活本窗体
if (han != GetFocus()){
SetFocus(han);
}
this.WindowState = FormWindowState.Normal;
}
方法二
[System.Runtime.InteropServices.DllImport("user32")]
private static extern IntPtr GetActiveWindow();//获取当前窗体的活动状态
// 判断当前窗口是否处于活动状态的方法
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);
//在窗体On_Load事件中添加（Santos的代码）：
IntPtr hDeskTop=FindWindow("Progman", "Program Manager");
SetParent(this.Handle,hDeskTop);