why the exeption appier

Thank's a lot Frogleg. I have tried your code and the problem has disappeared.
Thank's to all  for your assistance and for your attention.

I think Frogleg is much more experienced with graphics than I am; do as he says.

instead of
map = tbmp;
use
Rectangle rct = new Rectangle(0,0,tbmp.Width,tbmp.Height);
map = tbmp.Clone(rct, tbmp.PixelFormat);
if map is equal to tbmp and tbmp is disposed - map = null
 

I think the question is why you are doing that; why are you disposing the object? I think there is no reason to do it.

You did not say if you understand about Paint. I think the answer to the question of why you are getting the error is that Windows needs the object to do the Paint. If you don't understand about painting in Windows then you need to learn about that.

Here is a simple rule. Don't call Dispose unless you know you need it.

Yes, you're right. I commented out the line "tbmp.Dispose();" and the program is no longer report an error. But perhaps someone can explain why it happening (this error)?

So the error is occurring when the program is doing a Paint; do you understand what I mean by that?

When I remove (comment out) the lines that call tgr.Dispose() and tbmp.Dispose() then the error is gone. I am not experienced with graphics in .Net but I really doubt that you need to call Dispose for those two objects; it is probably just a problem to call Dispose for them.

Here is the error message. Error occurs when you run "Application.Run (new Form1 ());". I use Russian version of VS2008. Therefore, not sure what the error message will be clear to you.

Below I will show the error message and a screen shot.

/*
System.ArgumentException ?? ??????????
Message="???????????? ????????."
Source="System.Drawing"
StackTrace:
? System.Drawing.Image.get_Width()
? System.Drawing.Image.get_Size()
? System.Windows.Forms.PictureBox.ImageRectangleFromSizeMode(PictureBoxSizeMode mode)
? System.Windows.Forms.PictureBox.OnPaint(PaintEventArgs pe)
? System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
? System.Windows.Forms.Control.WmPaint(Message& m)
? System.Windows.Forms.Control.WndProc(Message& m)
? System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
? System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
? System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
? System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
? System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
? System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
? System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
? System.Windows.Forms.Application.Run(Form mainForm)
? test_Move_Image.Program.Main() ? C:\Documents and Settings\?????????????\??? ?????????\Visual Studio 2008\Projects\test_Move_Image\test_Move_Image\Program.cs:?????? 18
? System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
? System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
? Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
? System.Threading.ThreadHelper.ThreadStart_Context(Object state)
? System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
? System.Threading.ThreadHelper.ThreadStart()
InnerException:
*/

Hi Akmal,
Put the image in solution explorer and try..Hope it will work.
Thanks,
Prasant