Re: C# and Window Message Hooks - C# Discussion Boards

how to show a windows application output (like acrobat reader) in the internet explorer?

14-Jul-05 4:04

Use the ^ operator for xor:

byte[] ip = {172,16,0,0};<br />
byte[] mask = {255,255,240,0};<br />
byte[] result = new byte[3];<br />
<br />
for (int i=0; i<4; i++) result[i] = ip[i] ^ (~mask[i]);

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RanjithLogics14-Jul-05 2:03

RanjithLogics

14-Jul-05 2:03

plz help me!!!!!!!!!!!!!! Cry | :((

I want to display my output form into the internet explorer.....(ex:Like acrobat reader opening in the internet explorer)

Ranjith

C# and Window Message Hooks

roy_huntley14-Jul-05 0:59

roy_huntley

14-Jul-05 0:59

Hi.

Im trying to find a way to hookup to the Window Created, Window Destroyed and Window Activated messages from my C# windows app. NB, id like to hook up to these messages from a system-wide scope and not just my own application (for example, id like to know whenever an internet explorer window is opened or made active.

Is this possible ? Ive managed to hookup to the mouse_ll and keyboard_ll events, but no more !

Can anybody tell me if its possible ? and/or provide an example ?

THanks.~

Roy.

Re: C# and Window Message Hooks

felopater14-Jul-05 5:44

felopater

14-Jul-05 5:44

u can do this with vc there is no hooking with c# on other applications windows messages. even if you used win32 hooking API's implicitly from c#, you will hook only your own Application Messages.

marcoryos

Network version of application in C#

Anonymous13-Jul-05 23:34

Anonymous

13-Jul-05 23:34

When I prepare a C# application, is it supposed to work only on a stand-alone machine or it automatically works on a network (intranet) also?

If it automatically works (as a default) on the network also, then is there any way to control the number of computers on the network on which it will work? For example, if I want to allow its operation on only one machine on the network, can I do so, and if yes, then how?

C# MySQL 5.0 and storeprocedure

dexom13-Jul-05 23:04

dexom

13-Jul-05 23:04

I want connect to MYSQL database by C# and I want to use storeProcedure to access database but I can't do that. Please help me

Gavin Jeffrey14-Jul-05 0:31

Gavin Jeffrey

14-Jul-05 0:31

Well to connect to mysql you either need an odbc driver which can be found at mysql's website or microsofts website. afaik mysql doesnt support stored procedures yet - it is only due in version 5 and I think they are far away from that.

Zishan Haider15-Jul-05 4:23

Zishan Haider

15-Jul-05 4:23

well I dont' know how do you call them .. but certainly MySql does support stored procedures form v.4.1 onwards!

Gavin Jeffrey15-Jul-05 6:00

Gavin Jeffrey

15-Jul-05 6:00

I call them stored procedures and I beg to differ with you on that statement.

http://dev.mysql.com/doc/mysql/en/roadmap.html[^]

The current production release is 4.1. MySQL 5.0 is available in alpha status. See the table of features and which version they belong to.

Guffa14-Jul-05 3:48

Resizing Gif-images that is transparent

14-Jul-05 3:48

What do you mean when you say that you can't do that? What is it that you need?

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thomasa13-Jul-05 23:02

13-Jul-05 23:02

I'm trying to resize a gif-image that is transparent. But it looses it's transparesy.
Does someone know how to do this?

My code:
public Bitmap _bitmap = null;
private void getGraphicsFromImageNotStretched(MemoryStream ms, int hight, int width)
{
Image image = Image.FromStream(ms);
double orgHight = (double)image.Height;
double orgWidth = (double)image.Width;
if((orgHight * hight) > (orgWidth * width))
{
double ratio = (orgWidth * width) / (orgHight * hight);
_bitmap = new Bitmap(image, (int)((double)width * ratio), hight);
}
else
{
double ratio = (orgHight * hight) / (orgWidth * width);
_bitmap = new Bitmap(image, width, (int)((double)hight * ratio));
}

image.Dispose();
}

Thanks
Thomas

Guffa14-Jul-05 3:56

14-Jul-05 3:56

I suppose it's because it is a GIF image it has a palette. When you resize it, it has to be converted to a true color image (or the resizing would look awful), and the transparency is lost.

If you convert it to true color before you resize it, it should be possible to keep the transparency.

If you use a true color PNG image with aplha channel transparency instead, it will work, and it will look much better. I use this for water marks on images.

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thomasa19-Jul-05 5:51

19-Jul-05 5:51

Thanks for your replay.
I've tried different things out, but I don't seem to get it right.
The closest I've come is getteing a light-blue background (using PNG).
You don't have a code-snipp that could get me in the right direction.

Thanks
Thomas

Guffa25-Jul-05 3:47

25-Jul-05 3:47

As I said, I have used a transparent PNG, and I had no problem at all with the transparency.

How do you use the resized image? Are you saving it as a file? If so, what file format are you using?

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thomasa8-Aug-05 1:57

8-Aug-05 1:57

I'm creating small icons of images in an ASP page, so I'm writing the images to the output stream.

First I'm resizing the image, witch data I get from a memory stream (this data is an transparent image):

public Bitmap _bitmap = null;
private void getGraphicsFromImageNotStretched(MemoryStream ms, int hight, int width)
{
Image image = Image.FromStream(ms, true);

double orgHight = (double)image.Height;
double orgWidth = (double)image.Width;
if((orgHight * hight) > (orgWidth * width))
{
double ratio = (orgWidth * width) / (orgHight * hight);
_bitmap = new Bitmap(image, (int)((double)width * ratio), hight);
_bitmap.Palette = image.Palette;
_bitmap.MakeTransparent();
}
else
{
double ratio = (orgHight * hight) / (orgWidth * width);
_bitmap = new Bitmap(image, width, (int)((double)hight * ratio));
_bitmap.Palette = image.Palette;
_bitmap.MakeTransparent();
}

image.Dispose();
}

Then I write the data to the output stream:

public static byte[] GenerateImageBytes(Bitmap theBitmap)
{
byte[] bytes = null;

// save the image to the output stream
System.IO.MemoryStream ms = new System.IO.MemoryStream();
theBitmap.Save(ms, ImageFormat.Png);
bytes = ms.ToArray();
ms.Close();

return bytes;
}

This result in an image that is not treansparent Frown | :(

Thanks
Thomas

Guffa8-Aug-05 22:55

8-Aug-05 22:55

If you call the MakeTransparent method without specifying a color, it will set the default transparent color as transparent. Do you know what color this is, and that it's the correct color to set as transparent?

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thomasa9-Aug-05 1:06