How to avoid flickering while creating MDI child form?

4 Feb 20251 minute to read

Flickering can be avoided by calling the below methods.

• LockHostFormUpdate
• UnLockHostFormUpdate

The LockHostFormUpdate and UnLockHostFormUpdate methods are used to lock and unlock the host form’s updates respectively. These methods helps in avoiding flickering while creating an MDI child form. These methods can be used in the following way.

C#

//To avoid flickering

this.dockingManager1.LockHostFormUpdate();

this.dockingManager1.DockControl(form, this, Syncfusion.Windows.Forms.Tools.DockingStyle.Right, 0);

this.dockingManager1.SetAsMDIChild(form, true);

this.dockingManager1.SetControlSize(form, size);

this.dockingManager1.UnlockHostFormUpdate();

VB.NET

'To avoid flickering

Me.dockingManager1.LockHostFormUpdate()

Me.dockingManager1.DockControl(form, Me, Syncfusion.Windows.Forms.Tools.DockingStyle.Right, 0)

Me.dockingManager1.SetAsMDIChild(form, True)

Me.dockingManager1.SetControlSize(form, size)

Me.dockingManager1.UnlockHostFormUpdate()