JayvardhanPune wrote:
> I am using .Net 1.1
> I am facing a problem with my GDI++ code in C# control.
>
> Though i have tried many things from last 6 months, i am not able to get
> completely rid of this bug.
>
> Whenever the user is opening a window or closing a window, i'm getting
> following exception.
>
> This is a very rare exception but it causes the whole application crash and
> has become a nigtmare for me.
>
> This problem is more frequent on Citrix client as compared to normal desktop
> environment.
>
> InnnerException: Invalid parameter used.
>
> Stack Trace: at System.Drawing.Region.GetHrgn(Graphics g)
> at System.Windows.Forms.Control.GetHRgn(Region region)
> at System.Windows.Forms.Control.OnHandleCreated(EventArgs e)
> at System.Windows.Forms.Control.WmCreate(Message& m)
> at System.Windows.Forms.Control.WndProc(Message& m)
> at System.Windows.Forms.ButtonBase.WndProc(Message& m)
> at System.Windows.Forms.Button.WndProc(Message& m)
> at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
> at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
> at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
> IntPtr wparam, IntPtr lparam)
> Source: System.Drawing
>
> I have done following coding in a control which is derived from
> System.Windows.Forms.Button
>
> protected override void OnPaint(PaintEventArgs e)
> {
> if(this != null)
> {
> if(!this.IsDisposed && !this.Disposing)
> {
> using(GraphicsPath path = new GraphicsPath(FillMode.Alternate))
> {
> path.AddEllipse(0, 0, this.Width, this.Height);
> using(Region rgn = new Region(path).Clone())
> {
> ctrl.Region=rgn.Clone();
> }
> }
> }
> }
> }
>
> I'll appriciate if you can provide some help.
>
> ----------------------------------------
> Regards,