Re: Exporting functions - C# Discussion Boards

eynats19-Jun-02 2:33

19-Jun-02 2:33

In my code I have created a new process (with CreateProcess)
and I need the handle (HWND) of the process's window.
but I couldn't figure how to find the new process's related window.
For example, I create a new "NotePad" process.
later I need to send a message to the "NotePad"
how???
if any one can help me
thanks!
Eynat Rose | [Rose]

Re: finding the process's HWND

Feng Qin19-Jun-02 3:01

Feng Qin

19-Jun-02 3:01

I think you can use the DllImport to use the window's api in dll to finish this job.

I'm amumu, and you?

Re: finding the process's HWND

eynats19-Jun-02 3:34

eynats

19-Jun-02 3:34

Thank you for your respond.
Can U please write me a small example - couse I didn't understand what you ment.
Eynat.

Re: finding the process's HWND

Mazdak19-Jun-02 5:50

Mazdak

19-Jun-02 5:50

He means you can use API.Here an example of importing kernel32.dll:

http://www.codeproject.com/cs/miscctrl/drivecombobox.asp

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

Re: finding the process's HWND

Chris Rickard19-Jun-02 4:32

Chris Rickard

19-Jun-02 4:32

You mentioned CreateProcess, are you using the WinAPI CreateProcess? Or are you referring to a process created with System.Diagnostics.Process.Start()? Either way you can use this class to bind to a process if you have its PID or even just the process name (executable). Once bound use the Handle property to get the HWND.

Re: finding the process's HWND

leppie19-Jun-02 10:50

leppie

19-Jun-02 10:50

here some code i used for the winamp api

<br />
[DllImport("user32.dll")]<br />
public static extern int FindWindow(string c,int d);<br />
[DllImport("user32.dll")]<br />
public static extern int SendMessage(int hWnd,int msg, int wparam, int lparam);<br />

hope it helps Smile | :)

Exporting functions

leppie18-Jun-02 23:56

leppie

18-Jun-02 23:56

Hi, dunno if this can be done or how... Confused | :confused:

text from MIRC help file:

This section contains technical information for programmers who want to create DLLs for use with mIRC.

The routine in the DLL being called must be of the form:

int __stdcall procname(HWND mWnd, HWND aWnd, char *data, char *parms, BOOL show, BOOL nopause)

The question is how would implement such a function in C# the can be accessed by MIRC. MIRC also allows for calling COM objects. Would this be an easier solution perhaps Confused | :confused:

Any help would be really grateful Big Grin | :-D

Re: Exporting functions

Feng Qin19-Jun-02 1:01

Feng Qin

19-Jun-02 1:01

Can you code like the following?

[DllImport("kernel32", SetLastError=true)]
static extern unsafe int CreateFile(
string filename,
uint desiredAccess,
uint shareMode,
uint attributes,
uint creationDisposition,
uint flagsAndAttributes,
uint templateFile);

I'm amumu, and you?

Re: Exporting functions

leppie19-Jun-02 1:22

leppie

19-Jun-02 1:22

hello?

from what i can see you are using an external function in C# here. I want an external app to use a C# dll.

Re: Exporting functions

Nish Nishant19-Jun-02 1:30

Nish Nishant

19-Jun-02 1:30

leppie wrote:
I want an external app to use a C# dll.

I suggest that you make a CCW (COM callable wrapper)

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Re: Exporting functions

leppie19-Jun-02 2:04

leppie

19-Jun-02 2:04

Thx for all the quick replies Smile | :)

Just one reason to come back for more Smile | :)

After some investigation it seems the COM way is the way to go.

Re: Exporting functions

leppie19-Jun-02 11:20

leppie

19-Jun-02 11:20

just a stupid question: i presume this CCW cant be written in C#, can it? Unsure | :~

Re: Exporting functions

Nish Nishant19-Jun-02 11:34

Nish Nishant

19-Jun-02 11:34

leppie wrote:
just a stupid question: i presume this CCW cant be written in C#, can it?

It can. Write your DLL using C#. Now using Regasm.exe you can register your C# DLL as a COM component. This allows COM clients to instantiate and use your class as if it was in a normal COM DLL.

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Re: Exporting functions

leppie19-Jun-02 20:31

leppie

19-Jun-02 20:31

Thx Nish

but it does not seem to work as I think it should. Have a look at example.

<br />
using System;<br />
<br />
namespace MircDll<br />
{<br />
	public class MircDll<br />
	{<br />
		public static int Test(ref string test)<br />
		{<br />
			test = "HELP me I'M in TROUBLE";<br />
			return 1;<br />
		}<br />
	}<br />
}<br />

I compile then run regasm, but mirc cannot see this as a COM object. What else do i need? Or is Mirc just plain evil?

I will try some more anyways Smile | :)

Re: Exporting functions

Michael P Butler19-Jun-02 1:42

Michael P Butler

19-Jun-02 1:42

I've not looked into calling managed code from an unmanaged app but I very much doubt that MIRC would call a C# dll, you'd be better sticking to C++.

Michael Smile | :)

"Eureka" is Greek for "This bath is too hot"

F:\Dev\ASP.NET\dw\CRC32.cs(87): Operator '<<' cannot be applied to operands of type 'int' and 'uint' ??

Todd Smith18-Jun-02 16:49

Todd Smith

18-Jun-02 16:49

F:\Dev\ASP.NET\dw\CRC32.cs(87): Operator '<<' cannot be applied to operands of type 'int' and 'uint'

For some reason it doesn't like rv |= 1 << (c - i); ??

protected static uint Reflect(uint val, byte c)
{
    uint rv = 0;

    for (uint i=1; i<(c + 1); i++)
    {
        if ((val & 1) != 0)
        {
            rv |= 1 << (c - i);
        }
        val >>= 1;
    }

    return rv;
}

Todd Smith

Re: F:\Dev\ASP.NET\dw\CRC32.cs(87): Operator '<<' cannot be applied to operands of type 'int' and 'uint' ??

Rüpel18-Jun-02 20:54

Rüpel

18-Jun-02 20:54

i haven't tried, but 1 is a integer-constant
maybe this works:

int one=1;
rv |= one << (c-i);

just an idea... Roll eyes | :rolleyes:

:wq

Re: F:\Dev\ASP.NET\dw\CRC32.cs(87): Operator '<<' cannot be applied to operands of type 'int' and 'uint' ??

Feng Qin19-Jun-02 0:56

Feng Qin

19-Jun-02 0:56

You can write like this:

rv |= (uint)(1 << (int)(c - i));
Roll eyes | :rolleyes:

I'm amumu, and you?

Re: F:\Dev\ASP.NET\dw\CRC32.cs(87): Operator '<<' cannot be applied to operands of type 'int' and 'uint' ??

Todd Smith19-Jun-02 6:38

Todd Smith

19-Jun-02 6:38

works like a charm.

thanks

Todd Smith

MCSD 70-316

kasturirawat18-Jun-02 11:26

kasturirawat

18-Jun-02 11:26

Hi,
I'm preparing for "Exam 70-316*—Developing and Implementing Windows-based Applications with Microsoft Visual C# .NET and Microsoft Visual Studio .NET".

Any suggestion\help and cpmments would be apprecaited.

Kasturi

Re: MCSD 70-316

Feng Qin19-Jun-02 1:06

Feng Qin

19-Jun-02 1:06

I always think C# is more same as Delphi in develop windows application:
drag and drop;
hanlde event call back function.

I'm amumu, and you?

Re: MCSD 70-316

Not Active19-Jun-02 8:35

Not Active

19-Jun-02 8:35

Pratice and experience has been the key in my MCSD experience

Center text in a RichTextBox

kyledunn18-Jun-02 10:30

kyledunn

18-Jun-02 10:30

Can anyone tell me how to center selected text in a RichTextBox. I loaded a rtf formatted document from Word that was centered in Word and it displayed centered in the RichTextBox so I think it can be done. I would apprectiate any help. Thanks,

Kyle

Re: Center text in a RichTextBox

John Mautari19-Jun-02 21:13

John Mautari

19-Jun-02 21:13

Use the SelectionAlignment method of RichTextBox class.

richTextBox1.SelectionAlignment(HorizontalAlignment.Center);

Re: Center text in a RichTextBox

John Mautari19-Jun-02 21:17

John Mautari

19-Jun-02 21:17

Ooops, SelectionAlignment is not a method, but a property, so you need to use...

richTextBox1.SelectionAlignment = HorizontalAlignment.Center;

Better I go sleep now... Unsure | :~

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