C# 如何判断一个程序是否失去焦点？？？

[DllImport("user32.dll")]

public static extern IntPtr GetActiveWindow()

被其它窗口遮盖住不一定失去焦点链宏弯绝罩

不要忘记采棚闷纳

TextBox的TabStop设为False

然后重写窗歼仔枣体氏拆的戚颤

protected override bool ProcessTabKey(bool forward)

{

foreach (Control c in this.Controls)

{

if(c is TextBox)

{

c.TabStop = true

}

}

return base.ProcessTabKey(forward)

}

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