IContainerControl.ActivateControl Method

ContainerControl::IContainerControl::ActivateControl Method

Activates the specified control.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

private:
virtual bool ActivateControl(
	Control^ control
) sealed = IContainerControl::ActivateControl

Parameters

control
Type: System.Windows.Forms::Control

The Control to activate.

Return Value

Type: System::Boolean
true if the control is successfully activated; otherwise, false.

Implements

IContainerControl::ActivateControl(Control)

The control parameter must be a child of the container control.

The following code example demonstrates how to inherit from the ScrollableControl class and implement the IContainerControl interface. Implementation is added to the ActiveControl property and the ActivateControl method.

using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;

public ref class MyContainer: public ScrollableControl, public IContainerControl
{
private:
   Control^ activeControl;

public:
   MyContainer()
   {
      // Make the container control Blue so it can be distinguished on the form. 
      this->BackColor = Color::Blue;

      // Make the container scrollable. 
      this->AutoScroll = true;
   }

   property Control^ ActiveControl 
   {
      // Add implementation to the IContainerControl.ActiveControl property. 
      virtual Control^ get()
      {
         return activeControl;
      }

      virtual void set( Control^ value )
      {

         // Make sure the control is a member of the ControlCollection. 
         if ( this->Controls->Contains( value ) )
         {
            activeControl = value;
         }
      }
   }

   // Add implementations to the IContainerControl.ActivateControl(Control) method. 
   virtual bool ActivateControl( Control^ active )
   {
      if ( this->Controls->Contains( active ) )
      {
         // Select the control and scroll the control into view if needed.
         active->Select(  );
         this->ScrollControlIntoView( active );
         this->activeControl = active;
         return true;
      }

      return false;
   }
};

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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