OSFeature.GetVersionPresent(Object) 方法

public:
 override Version ^ GetVersionPresent(System::Object ^ feature);

public override Version GetVersionPresent (object feature);

public override Version? GetVersionPresent (object feature);

override this.GetVersionPresent : obj -> Version

Public Overrides Function GetVersionPresent (feature As Object) As Version

參數

傳回

Version 表示目前可在系統上使用的指定作業系統功能版本，如果未發現此功能，則為 null。

範例

下列範例會 LayeredWindows 查詢 OSFeature 功能。 系統會檢查版本，以查看其是否為 null ，以判斷功能是否存在。 結果會顯示在文字方塊中。 此程式碼假設 textBox1 已建立並放置在表單上。

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 ( myVersion != nullptr )
      {
         textBox1->Text = "Layered windows feature is installed.\n";
      }
      else
      {
         textBox1->Text = "Layered windows feature is not installed.\n";
      }
   }

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 (myVersion != null)
      textBox1.Text = "Layered windows feature is installed.\n";
   else
      textBox1.Text = "Layered windows feature is not installed.\n";
}

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 (myVersion IsNot Nothing) Then
        textBox1.Text = "Layered windows feature is installed." & _
           ControlChars.CrLf
    Else
        textBox1.Text = "Layered windows feature is not installed." & _
           ControlChars.CrLf
    End If
End Sub

備註

Feature使用 屬性， static 這個類別中提供的 實例 OSFeature ，查詢功能的版本號碼。

適用於

另請參閱

• Version
• Feature
• FeatureSupport
• LayeredWindows