OSFeature.LayeredWindows 字段

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

表示分层的、顶级窗口功能。 此字段为只读。

public: static initonly System::Object ^ LayeredWindows;

public static readonly object LayeredWindows;

 staticval mutable LayeredWindows : obj

Public Shared ReadOnly LayeredWindows As Object 

字段值

Object

示例

以下示例确定当前系统是否支持分层窗口。 基类方法 IsPresent 被调用 作为 LayeredWindows 要查找的功能。 结果显示在文本框中。 此代码假定 textBox1 已实例化并放置在窗体上。

private:
   void LayeredWindows()
   {
      // Gets the version of the layered windows feature.
      Version^ myVersion = OSFeature::Feature->GetVersionPresent(
         OSFeature::LayeredWindows );
      
      // Prints whether the feature is available.
      if ( OSFeature::Feature->IsPresent( OSFeature::LayeredWindows ) )
      {
         textBox1->Text = "Layered windows feature is installed.";
      }
      else
      {
         textBox1->Text = "Layered windows feature is not installed.";
      }
   }

private void LayeredWindows() {
   // Gets the version of the layered windows feature.
   Version myVersion =
       OSFeature.Feature.GetVersionPresent(OSFeature.LayeredWindows);

   // Prints whether the feature is available.
   if (OSFeature.Feature.IsPresent(OSFeature.LayeredWindows))
      textBox1.Text = "Layered windows feature is installed.";
   else
      textBox1.Text = "Layered windows feature is not installed.";
}

Private Sub LayeredWindows()
    ' Gets the version of the layered windows feature.
    Dim myVersion As Version = _
       OSFeature.Feature.GetVersionPresent(OSFeature.LayeredWindows)
       
    ' Prints whether the feature is available.
    If OSFeature.Feature.IsPresent(OSFeature.LayeredWindows) Then
        textBox1.Text = "Layered windows feature is installed."
    Else
        textBox1.Text = "Layered windows feature is not installed."
    End If
End Sub

注解

操作系统可将分层窗口设为透明或半透明。 Windows 2000 中首次引入了对分层窗口的支持。

若要确定是否安装了分层 Windows 功能，请使用 Feature 属性调用基类方法IsPresentLayeredWindows，作为要查找的功能。

或者，可以通过调用 GetVersionPresent 方法来检查来查看是否安装了该功能，并将 LayeredWindows 作为要查找的功能。

另请参阅

• IsPresent
• GetVersionPresent(Object)
• Feature