C# Discussion Boards - CodeProject

Rickard Andersson²⁰12-Jun-02 1:44

12-Jun-02 1:44

Nish - Native CPian wrote:
I recommend that you use MC++

So... I can use MC++ in C#??

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C# and C++!

Re: Control ID's

Nish Nishant12-Jun-02 1:46

Nish Nishant

12-Jun-02 1:46

Rickard Andersson wrote:
So... I can use MC++ in C#??

I actually meant that you can use MC++ instead of C#.
Basically if you don't have GUI-intensive work you can use MC++.
Right now they don't have a form designer for MC++. When that comes out you can use MC++ for all your .NET coding. That way you can use your old MFC/ATL code as well as new managed code

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Re: Control ID's

Rickard Andersson²⁰12-Jun-02 2:05

Rickard Andersson²⁰

12-Jun-02 2:05

So for now there is plain C# you can code in Visual C#?
hmm.. agh!

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C# and C++!

Interprocess communication

paulb11-Jun-02 17:31

paulb

11-Jun-02 17:31

I need a simple method for one instance of a winforms program to communicate with another. In Win32 I did this with a named event object but it doesn't look like there is an equivalent in the framework?

I just need a flag which can be set/reset and read by multiple processes.

Re: Interprocess communication

Nish Nishant11-Jun-02 18:12

Nish Nishant

11-Jun-02 18:12

I think you can use events.

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Re: Interprocess communication

Nish Nishant11-Jun-02 18:17

Nish Nishant

11-Jun-02 18:17

Nish - Native CPian wrote:
I think you can use events.

Oops! I think I was wrong there Frown | :-(

But you can use a named Mutex object if all you want to do is signal some state.

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Keyboard key pressed

BLaZiNiX11-Jun-02 13:27

BLaZiNiX

11-Jun-02 13:27

I have a special keyboard with some special button at the top of the F.. button like (Banking,My Site,Shopping,Volume Up,Volume Down) and things like that. And this keyboard came with the computer (E-Machine) and those special button works only with the Windows 98 version that came with the computer, now i'm on XP (and you can figure that those buttons don't works) and I want to know how can I create a program that I will put in the tray or maybe a service that can detect when I'm pressing the selected button on the keyboard and add an action to it like Process.Start("http://www.google.com"); on the My Site Button.

Any suggestion ??

Thanks

Re: Keyboard key pressed

Nick Parker11-Jun-02 17:59

Nick Parker

11-Jun-02 17:59

You could begin by overriding the WndProc method and watch to see the message you send when pressing those special buttons, if at all. You could also try to override the onKeyPress method as well to see if you get a reaction from Windows. No guarantees here though as I am not exactly sure this would work, just a thought. Smile | :)

Nick Parker

Re: Keyboard key pressed

BLaZiNiX12-Jun-02 15:20

BLaZiNiX

12-Jun-02 15:20

k and how can i override the WndProc, do u have an example please ??

Re: Keyboard key pressed

James T. Johnson12-Jun-02 15:58

James T. Johnson

12-Jun-02 15:58

protected override void WndProc(ref Message m)
{
  // Handle messages, if you don't want to use the base
  // implementation return before finishing
  switch(m.Message)
  {
    .....
  }

  base.WndProc(ref m);
}

[Edit: The value to use for the case statment can be found in the Windows SDK; best thing you can do is use the "Find in Files" feature and point it at the PlatformSDK/include directory]

HTH,

James

Re: Keyboard key pressed

BLaZiNiX12-Jun-02 18:02

BLaZiNiX

12-Jun-02 18:02

hi,

i tried to override it using the WM_KEYDOWN like in VC++ but no result, i test my sample app with a listbox so when i'm clicking a key i'm suppose to get his value but no result and something strange it's that i tried to make the same thing but using the OnKeyPressed an no result too , that's strange ...

Can you show me the way to do it please ?

Thanks a lot James Smile | :)

Re: Keyboard key pressed

Nick Parker13-Jun-02 2:33

Nick Parker

13-Jun-02 2:33

Thanks James, I just got into work and got the response from BLaZiNiX, you just beat me to it. Big Grin | :-D

Nick Parker

client connection class

11-Jun-02 11:51

Is there a way to create a class named after the value of a variable?

Let me explain what i'm trying to do.

A thread is started that monitors a port for connections. When a connection is made I want to make a new instance of a 'connectedClient' class (to handle sending/recieving from that client). How can i 'randomly' name a class instance (I can't have all my connectedClient class instances share the same name) and how can i keep track of their names (maybe an array?).

Thanks, from someone with only php experience (don't do much threading in scripting languages)

Re: client connection class

James T. Johnson11-Jun-02 12:24

James T. Johnson

11-Jun-02 12:24

You don't.... The variable name is just a name for the programmer to reference.

I would create a Hashtable and use the name as the key; storing the relevant connectedClient instance in the table.

Hashtable clients = new Hashtable();
  
CreateNewClient(string name)
{
  connectedClient c = new connectedClient();
  // do stuff to setup client
 
  clients[name] = c;
}
 
connectedClient GetClient(string name)
{
  return (clients[name] as connectedClient);
}

HTH,

James

Regular DLLs

Hugo Hallman11-Jun-02 11:38

Hugo Hallman

11-Jun-02 11:38

Short question, from a C++er to you C#ers
Is it at all possible to use old standard dlls in c#
If yes I might consider learning C#.

Greatful for any answer.

Hugo

Re: Regular DLLs

James T. Johnson11-Jun-02 12:21

James T. Johnson

11-Jun-02 12:21

huggeh wrote:
Is it at all possible to use old standard dlls in c#

Yes, via P/Invoke... Look at DllImportAttribute, StructLayoutAttribute, and Marshal classes.

James

Key presses in WinForms

Brian Olej11-Jun-02 9:53

Brian Olej

11-Jun-02 9:53

I have a small problem, I know that for testing for key press you use the keypress message handler but how can I test which key was pressed (for example the Escape key)?

Re: Key presses in WinForms

Mazdak11-Jun-02 11:03

Mazdak

11-Jun-02 11:03

if(e.KeyChar == asciicode)
{
}

Mazy

"The more I search, the more my need
For you,
The more I bless, the more I bleed
For you."The Outlaw Torn-Metallica

Re: Key presses in WinForms

Brian Olej11-Jun-02 11:46

Brian Olej

11-Jun-02 11:46

Thank you but I had figured it out on my own and had forgotten to delete the thread Smile | :)

Re: Key presses in WinForms

Rüpel18-Jun-02 0:39

Rüpel

18-Jun-02 0:39

don't delete threads - some people might be searching this forum for solutions when they have a similar problem... Roll eyes | :rolleyes:

:wq

Now to acess toolbar or statusbar in the crystalreportviewer ?

11-Jun-02 9:22

Hi everybody!
I would like to have toolbar and statusbar on the CrystalReportViewer -- modified (additional buttons, other graphics .., etc., additional panels)
What is the best way to do it? Confused | :confused:

I am using .NET studio and C#...

Thanks in advance...

STM_SETIMAGE

vikramlinux11-Jun-02 4:40

vikramlinux

11-Jun-02 4:40

I have one c# application containing Picture(Bitmap). I have one MFC dll thrugh which I want to change the bimap by sending message
like
LRESULT lResult=::SendMessage(hwndImage,STM_SETIMAGE,(WPARAM)IMAGE_BITMAP,(LPARAM)hBmpToSet);
returned lResult is 0 Frown | :(

But It's not working. Plz help me ! Cry | :((

VIKS

Re: STM_SETIMAGE

James T. Johnson11-Jun-02 9:17

James T. Johnson

11-Jun-02 9:17

The Bitmap stored in your C# application isn't an HBITMAP, it is a GDI+ Bitmap; which could be part of the problem. Create your own message to send to the application then in that applications WndProc trap the message and use Bitmap.FromHBitmap to convert it to a GDI+ Bitmap.

Hope that makes sense,

James

Re: STM_SETIMAGE

vikramlinux11-Jun-02 19:17

vikramlinux

11-Jun-02 19:17

thanx . I tried with Bitmap.FromHBitmap . It just works fine Smile | :)

Now I have one more problem. I have Bitmap on the c# application. Whenever I clicks on that Bitmap. I want it get WM_LBUTTONUP Message. But is directly goes to the handler. NO any WM_LBUTTONUP. In case of normal MFC application the thing are in this sequence .WM_COMMAND then WM_LBUTTONUP.but WM_LBUTTONUP
message is missing in c# application.what I need to do? OMG | :OMG:

VIKS

Re: STM_SETIMAGE

James T. Johnson11-Jun-02 19:17

James T. Johnson

11-Jun-02 19:17

You need to trap the MouseUp event on the control/form you are interested in. I assume the bitmap is displayed in a PictureBox (the MouseUp event is defined by Control, which all controls inherit from).

If that isn't the case how are you displaying the bitmap?

James

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.