[VB.NET] Effetto sfarfallio (flickering) dello sfondo in User Control

[Ciucianespoi]

Salve a tutti.
Mi sto construendo un mio user control sul quale all'evento Paint mi disegno il contenuto.

Ho un problema quando runtime ridimensiono questo controllo, in quanto mentre fa il refresh mi da un fastidioso intermittente background grigio chiaro. C'è un modo per risolvere la cosa?

Grazie anticipatamente della risposta.

Daniele

[alka]

Prova a impostare la proprietà DoubleBuffered a True.

[Ciucianespoi]

Ciao Alka. Grazie innanzitutto per la risposta.

Ho provato ad impostare la proprietà DoulbeBuffer su True, ma mi da errore (Parametro non valido").

C'è un modo particolare per gestire questa proprietà protetta?

Grazie.

Daniele

[alka]

Prova a postare il codice che ti restituisce l'errore.

[Ciucianespoi]

Ecco il codice dell'errore:
System.ArgumentException was unhandled
Message="Parametro non valido."
Source="System.Drawing"
StackTrace:
in System.Drawing.Graphics.GetHdc()
in System.Drawing.BufferedGraphics.RenderInternal(Han dleRef refTargetDC, BufferedGraphics buffer)
in System.Drawing.BufferedGraphics.Render()
in System.Windows.Forms.Control.WmPaint(Message& m)
in System.Windows.Forms.Control.WndProc(Message& m)
in System.Windows.Forms.ScrollableControl.WndProc(Mes sage& m)
in System.Windows.Forms.Control.ControlNativeWindow.O nMessage(Message& m)
in System.Windows.Forms.Control.ControlNativeWindow.W ndProc(Message& m)
in System.Windows.Forms.NativeWindow.DebuggableCallba ck(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
in System.Windows.Forms.UnsafeNativeMethods.DispatchM essageW(MSG& msg)
in System.Windows.Forms.Application.ComponentManager. System.Windows.Forms.UnsafeNativeMethods.IMsoCompo nentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
in System.Windows.Forms.Application.ThreadContext.Run MessageLoopInner(Int32 reason, ApplicationContext context)
in System.Windows.Forms.Application.ThreadContext.Run MessageLoop(Int32 reason, ApplicationContext context)
in System.Windows.Forms.Application.Run(ApplicationCo ntext context)
in Microsoft.VisualBasic.ApplicationServices.WindowsF ormsApplicationBase.OnRun()
in Microsoft.VisualBasic.ApplicationServices.WindowsF ormsApplicationBase.DoApplicationModel()
in Microsoft.VisualBasic.ApplicationServices.WindowsF ormsApplicationBase.Run(String[] commandLine)
in DesktopMultiLayer.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:riga 81
in System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
in System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
in Microsoft.VisualStudio.HostingProcess.HostProc.Run UsersAssembly()
in System.Threading.ThreadHelper.ThreadStart_Context( Object state)
in System.Threading.ExecutionContext.Run(ExecutionCon text executionContext, ContextCallback callback, Object state)
in System.Threading.ThreadHelper.ThreadStart()
InnerException: