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I'm not sure if this will work, but try re-creating the handle for each control after changing the visibility of one (perhaps override OnVisibleChanged and doing it from within there after the call to base.OnVisibleChanged). Since it appears that the control is re-created when changing the visibility of the current control, you could always handle the VisibleChanged event of the other control and re-create your own handle as well.
Microsoft MVP, Visual C#
My Articles
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I just got it to work by inserting another control between the 2 panels during AddRange(...)
this.Controls.AddRange(new System.Windows.Forms.Control[] { this.panelLeft, this.progressBar, this.panelBottom, ...});
But this doesn't make sense. The progress bar is located far away from the panels.  Ah, never mind.... Thanks anyway... 
<font=arial>Weiye Chen
When pursuing your dreams, don't forget to enjoy your life...
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Deal all ,
in win32 API we can get a control HDC from its handel then we can use that hdc as a sourec for drawing functions like bitblt , streatchblt ...
but in .net farmework how can a do a simmilar jop by using GDI+ where any image drawing function use just the iamge object ???
Regs.
Mhmoud Rawas
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Software Eng.
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I am not sure if this is what u wanted:
Graphics graphics = Graphics.FromHwnd(MyControl.Handle);
<font=arial>Weiye Chen
When pursuing your dreams, don't forget to enjoy your life...
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Dear Sir,
Thanks for help But this inforamtion not usefull for my question, let me giv you an example,
if you like to capture the desktop in win32 API you can call
SourceHdc = GetDC(GetDesktopWindow())
then to draw the picture you can use
BitBlt ( TargetHDC , SourceHDC , 0 , 0 ....
so how can i do it in GDI+ without using HDC
Mhmoud Rawas
------------
Software Eng.
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Or use the CreateGraphics method inherited from Control. You can also override OnPaint in a Control derivative or handle the Paint event on a Control derivative outside that class (like by its container).
Microsoft MVP, Visual C#
My Articles
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Dear Sir,
Thanks for help But this inforamtion not usefull for my question, let me giv you an example,
if you like to capture the desktop in win32 API you can call
SourceHdc = GetDC(GetDesktopWindow())
then to draw the picture you can use
BitBlt ( TargetHDC , SourceHDC , 0 , 0 ....
so how can i do it in GDI+ without using HDC
Mhmoud Rawas
------------
Software Eng.
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GDI+ still uses handles. As the first reply mentioned, you can use Graphics.FromHwnd. Since you're not going to find a method that equates to BitBlt, you're most likely going to have to get an IntPtr representing the HDC from Graphics.GetHdc (call Graphics.ReleaseHdc when finished with the HDC) anyway. You could also skip this overhead and P/Invoke the GetDC API, passing Control.Handle that is the HWND. This type of solution is very common. Handles are still very much used in the implementations of every Windows Forms control, and many other classes (like ImageList).
Microsoft MVP, Visual C#
My Articles
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so you mean that we could not throw WIN32 API down and depend just on .Net classes, ...
No problem thanks for help again
Mhmoud Rawas
------------
Software Eng.
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first thanks for you
and i hope to help me again i create managed c++ class library and used com in it when i compiled it any errors not found but when i build the library this error found
(unresolved token IID_IACCESSCONTROLENTRY)
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Dear All,
I want to capture the keycode from keyboard buffer in VB.Net or C# Compact Framework.
Actually, I want to make a TSR(Terminate And Stay Resident) utility
which continuously look at the key strocks of keyboard and as soon as
a special key combination is pressed, it will invoke a function to
perform a series of actions.
For this purpose, I need to capture the keycode at system level not at
form level. So, how can i get keycode from keyboard buffer directly?
Tell me about some API for this purpose.
Regards,
Muhammad Arif
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Dear Mazy,
There are two issues in the link you provided
1- This is for .NET Framework not for .NET Compact Framework
2- This code is for Mouse hooking not for keyboard
Please reply me for the code related to keyboard and written in .net compact framework.
Regards,
Muhammad Arif
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aliarifpk wrote:
1- This is for .NET Framework not for .NET Compact Framework
Oh,sorry for that I didn't take attention to it.
aliarifpk wrote:
2- This code is for Mouse hooking not for keyboard
They follow the same procedure, you can find out yourself when you learn one.
Mazy
"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope
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Dear Mazy,
I am working on this task for last three days and the API's in .Net Framwork doesn't supported in .Net Compact Framework. That's why I am looking for some alternated which read the keyboard buffer and yet searching .... If someone has done this ... please let me know
Regards,
Muhammad Arif
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Windows CE doesn't support message hooks. Hooking the keyboard isn't possible like it is under Windows 9x/2000/XP/2003.
RageInTheMachine9532
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Dear Dave,
Can you provide me some authenticated URL which agree with your argument that Windows CE doesn't support hooking? I have to have a proof to my client for this argument.
Arif
Muhammad Arif
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aliarifpk wrote:
This is for .NET Framework not for .NET Compact Framework
I don't think it make difference cause you have to call win32 API as you can see in that article, so I think you can use those API there too.
Mazy
"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope
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UserControl in VisualBasic 6.0 has
UserControl_AsyncReadComplete(AsyncProp As AsyncProperty) Event,
UserControl_AsyncReadProgress(AsyncProp As AsyncProperty) Event and
UserControl.AsyncRead() Method
To create in C#, I should use what class?
Note: The event and method I mention is very excellent, No side effect while downloading
Sorry for bad English.
Thank You.
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What do you want to exactly do? and what is that UserControl? Those are Async. methods and in your class you don'm implement them, you just call them in your client like that.
Mazy
"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope
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hi,
I have some questions about making thread in my application, as I have no much experiences on Threading. Hope someone can help me.
In my application, I have a button function for outputing files. However, I need to generate some files and pictures before final step, the flow is simply like :
<br />
private void menuItem4_Click(object sender, System.EventArgs e)<br />
{<br />
....<br />
Main_generate_process();<br />
<br />
finalStep(); <br />
}<br />
The main problem is that before runing finalstep, I have to wait until the successful of Main_generate_process(), but I can't measure how long will the process take because the process is run in other DLL function, so I have an idea to use thread.
<br />
private void menuItem4_Click(object sender, System.EventArgs e)<br />
{<br />
....<br />
outThread = new Thread(new ThreadStart(ThreadProc));<br />
outThread.IsBackground = true;<br />
outThread.Start();<br />
<br />
do<br />
{ <br />
<br />
}while(this.outThread !=null);<br />
<br />
<br />
finalStep(); <br />
}<br />
<br />
public void ThreadProc()<br />
{ <br />
Main_generate_process();<br />
StopThread(); <br />
}<br />
<br />
private void StopThread()<br />
{<br />
if (this.outThread != null)<br />
{<br />
outThread.Interrupt();<br />
outThread = null;<br />
}<br />
}<br />
I found that the do-while loop also waste many times. Am I get a wrong idea?
The other quetion is :
can I call ThreadProc() directly in other function; i.e. if the thread has already started, and I need to run generate process again.
Thanks for help~~
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The method Thread.Join() should exactly fit to your requirements. See MSDN for further information. Your code should look like that:
private void menuItem4_Click(object sender, System.EventArgs e)
{
....
//Start the background thread
outThread = new Thread(new ThreadStart(ThreadProc));
outThread.IsBackground = true;
outThread.Start();
outThread.Join();
}
public void ThreadProc()
{
Main_generate_process();
}
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Thank you Troschi,
I have read and tried outThread.Join instead of using do-while loop, but Thread.Join() takes similar effect of do-while loop, it holds the main UI process, means caused the application in idle state.
I would like to run the process smoothly on background. so I need another good methods..
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