VisualStyleRenderer.IsElementDefined(VisualStyleElement) Method
Important
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Determines whether the specified visual style element is defined by the current visual style.
public:
static bool IsElementDefined(System::Windows::Forms::VisualStyles::VisualStyleElement ^ element);
public static bool IsElementDefined (System.Windows.Forms.VisualStyles.VisualStyleElement element);
static member IsElementDefined : System.Windows.Forms.VisualStyles.VisualStyleElement -> bool
Public Shared Function IsElementDefined (element As VisualStyleElement) As Boolean
- element
- VisualStyleElement
A VisualStyleElement whose class and part combination will be verified.
true
if the combination of the ClassName and Part properties of element
are defined; otherwise, false
.
The operating system does not support visual styles.
-or-
Visual styles are disabled by the user in the operating system.
-or-
Visual styles are not applied to the client area of application windows.
The following code example demonstrates how to use the IsElementDefined method to determine whether to initialize a VisualStyleRenderer to a given VisualStyleElement. This code example is part of a larger example provided for the VisualStyleRenderer class overview.
// Set the VisualStyleRenderer to a new element.
private:
bool SetRenderer(VisualStyleElement^ element)
{
if (!VisualStyleRenderer::IsElementDefined(element))
{
return false;
}
if (renderer == nullptr)
{
renderer = gcnew VisualStyleRenderer(element);
}
else
{
renderer->SetParameters(element);
}
return true;
}
// Set the VisualStyleRenderer to a new element.
private bool SetRenderer(VisualStyleElement element)
{
if (!VisualStyleRenderer.IsElementDefined(element))
{
return false;
}
if (renderer == null)
{
renderer = new VisualStyleRenderer(element);
}
else
{
renderer.SetParameters(element);
}
return true;
}
' Set the VisualStyleRenderer to a new element.
Private Function SetRenderer(ByVal element As _
VisualStyleElement) As Boolean
If Not VisualStyleRenderer.IsElementDefined(element) Then
Return False
End If
If renderer Is Nothing Then
renderer = New VisualStyleRenderer(element)
Else
renderer.SetParameters(element)
End If
Return True
End Function
This method checks the value of the IsSupported property internally.
Produit | Versions |
---|---|
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
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