C#怎么做一个永远没有焦点的窗口 类似输入法控制栏

 在窗体加入如下代码,防止窗体获得焦点

private const int WM_MOUSEACTIVATE = 0x21;private const int MA_NOACTIVATE = 3;protected override void WndProc(ref Message m){    if (m.Msg == WM_MOUSEACTIVATE)    {        m.Result = new IntPtr(MA_NOACTIVATE);        return;    }    base.WndProc(ref m);} protected override bool ShowWithoutActivation{    get    {        return false;    }}

 

然后再加入如下代码,防止窗体的控件获得焦点

void SetChildControlNoFocus(Control ctrl){    if (ctrl.HasChildren)        foreach (Button c in ctrl.Controls)        {            SetControlNoFocus(c);        }}MethodInfo SetControlStyleMethod;object[] SetControlStyleArgs = new object[] { ControlStyles.Selectable, false };private void SetControlNoFocus(Button ctrl){    SetControlStyleMethod.Invoke(ctrl, SetControlStyleArgs);    SetChildControlNoFocus(ctrl);}

最后就是在窗体的构造函数部分调用如下代码,完成初始化参数的任务

SetControlStyleMethod = typeof(Button).GetMethod("SetStyle",    BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.InvokeMethod);SetChildControlNoFocus(this);this.DoubleBuffered = true;SetStyle(ControlStyles.Selectable, false);this.TopMost = true;this.FormBorderStyle = FormBorderStyle.None;this.ShowIcon = false;this.ShowInTaskbar = false;

最后这个窗体,就永远无法获得焦点了