C# Discussion Boards - CodeProject

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 | :~

Re: Center text in a RichTextBox

kyledunn20-Jun-02 1:00

kyledunn

20-Jun-02 1:00

Thanks, that does the job. Have a nice nap ...

Kyle

derived webservice causes exception

Steve Severance18-Jun-02 6:35

Steve Severance

18-Jun-02 6:35

I have a class (MyComponent) that is derived from WebService. When ever I derive another class from this one the window that you switch to code view from puts up a message saying that the type initalizer for MyComponent threw an exception. What does this mean and how do i fix it?
Thanks.

Steve

Not all who wander are lost...

How to use BinaryWriter to write memory?

Zombies with Coffee, LLC18-Jun-02 5:45

Zombies with Coffee, LLC

18-Jun-02 5:45

My latest place that I'm stuck...

I call a function using DllImport that returns a pointer to some memory. How do I now write it to a file? The Write method doesn't take a pointer.

Thanks guys!

----------------------------------------------------------------

IntPtr pOutputBuffer = IntPtr.Zero;
IntPtr pInputBuffer = bmData.Scan0;

int iResult = wsq_compress_raw( pInputBuffer, ..., ref pOutputBuffer, ... );

FileStream pStream = new FileStream( strPathName, FileMode.Create, FileAccess.Write );
BinaryWriter pWriter = new BinaryWriter( pStream );

pWriter.Write( pOutputBuffer, 0, iCompressFileSize ); // Error

pWriter.Close( );
pStream.Close( );

Re: How to use BinaryWriter to write memory?

18-Jun-02 6:11

This should probably work:

unsafe
{
pWriter.Write((byte*)pOutputBuffer.ToPointer(),0,iCompressFileSize);
}

Re: How to use BinaryWriter to write memory?

Zombies with Coffee, LLC18-Jun-02 6:23

Zombies with Coffee, LLC

18-Jun-02 6:23

Thanks! I was headed there a few times, but...

unsafe
{
pWriter.Write((byte*)pOutputBuffer.ToPointer(),0,iCompressFileSize);
}

Gives the error: cannot convert from a byte* to byte[]

unsafe
{
pWriter.Write((byte[])pOutputBuffer.ToPointer(),0,iCompressFileSize);
}

Gives the error: cannot convert type void* to byte[]

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