C / C++ / MFC

How to know when a window is shown?

7-Aug-01 2:56

KB article Q207671 may have relevant info.

Tomasz Sowinski -- http://www.shooltz.com

Hiding A Check Box

AJ1237-Aug-01 1:20

AJ123

7-Aug-01 1:20

Hi
I have a HWND to a checkbox which i would like to hide.

But executing :

::ShowWindow(m_CheckBox,SW_HIDE);

Has no effect, anyone know where i am going wrong.

Cheers

Richard

Re: Hiding A Check Box

[James Pullicino]7-Aug-01 2:30

[James Pullicino]

7-Aug-01 2:30

What is m_CheckBox? Is it a control or a member variable?
If it is a control then:

m_CheckBox.ShowWindow(SW_HIDE);

should work.

(2b || !2b)

7-Aug-01 1:19

Hello.
Is possible to know when another window outside of our app has been open or is about to open?.
Thanks in advance

Re: How to know when a window is shown?

Tomasz Sowinski7-Aug-01 1:58

7-Aug-01 1:58

You'll have to create a global WH_CBT hook.

Tomasz Sowinski -- http://www.shooltz.com

Disabled Images

Derek Lakin6-Aug-01 23:58

6-Aug-01 23:58

Is there a way to create a disabled image from an image in a CImageList?

(It's not an image list for a toolbar).

Derek.

Re: Disabled Images

Tomasz Sowinski7-Aug-01 0:37

7-Aug-01 0:37

DrawState with DSS_DISABLED should be OK. Note that this function operates on a device context, you'll need to copy the imagelist into a bitmap, call DrawState, then copy back.

Tomasz Sowinski -- http://www.shooltz.com

Copy into a bitmap

Derek Lakin7-Aug-01 3:31

7-Aug-01 3:31

Sorry if this is a stupid question but how do I get an image in the image list into a bitmap. I had a look at the interface for image list and couldn't see anything like that Frown | :(

Derek - Salamander Software Ltd.

Tomasz Sowinski7-Aug-01 3:43

7-Aug-01 3:43

How do you initialize your imagelist? Is it one wide bitmap stored as resource, or something else?

Tomasz Sowinski -- http://www.shooltz.com

Derek Lakin7-Aug-01 8:58

7-Aug-01 8:58

Thanks for helping me out with this. The situation is this:

I am in the middle of doing an owner-drawn button that I want to allow bitmaps or icons to be added, which I can do by adding either to a CImageList. The problem so far is the disabled image. I have two functions which are illustrated below. The first is for adding the bitmap, which works for standard and disabled images and the second which works for the standard image but requires the addition of the disabled image. I apologise if the code is a bit spaghetti, but I am working towards having the ability if having multiple images set, but I'm not there yet Smile | :)

BOOL SSLButtonEx::SetButtonBitmap(UINT nResourceID, COLORREF crMask) {
	BOOL bReturn = m_bmpImage.LoadBitmap (nResourceID);
	if (TRUE == bReturn) {
		m_bmpImage.GetObject (sizeof m_bmp, &m_bmp);
		m_nImageWidth = m_bmp.bmWidth;
		m_nImageHeight = m_bmp.bmHeight;
		bReturn = m_imageList.Create (nResourceID, m_bmp.bmWidth, 1, crMask);
		if (TRUE == bReturn) {
			if (m_imageList.Add (&m_bmpImage, crMask) > -1) {
				m_bImageLoaded = TRUE;
			}
			else {
				m_bImageLoaded = FALSE;
			}
			m_crMask = crMask;

			HBITMAP bmpTemp;
			COLORMAP mapColour;
			mapColour.from = crMask;
			mapColour.to  = RGB(255,255,255);

			bmpTemp = (HBITMAP)::CreateMappedBitmap (AfxGetApp()->m_hInstance, 
				nResourceID, IMAGE_BITMAP, &mapColour, 1);
			m_hbmpDisabled = (HBITMAP)::CopyImage(bmpTemp, IMAGE_BITMAP, 
				m_nImageWidth, m_nImageHeight, LR_COPYDELETEORG);
		}
		else {
			m_bImageLoaded = FALSE;
		}
	}
	return bReturn;
}

BOOL SSLButtonEx::SetButtonIcon(UINT nResourceID, COLORREF crMask) {
	BOOL bReturn = FALSE;
	HINSTANCE hInstance = AfxFindResourceHandle (MAKEINTRESOURCE (nResourceID), RT_GROUP_ICON);

	m_hIcon = (HICON)::LoadImage (hInstance, MAKEINTRESOURCE (nResourceID), IMAGE_ICON, 0, 0, 0);
	if (NULL != m_hIcon) {
		m_crMask = crMask;
		ICONINFO iconInfo;
		ZeroMemory (&iconInfo, sizeof (ICONINFO));
		bReturn = ::GetIconInfo (m_hIcon, &iconInfo);
		if (TRUE == bReturn) {
			m_nImageWidth = iconInfo.xHotspot * 2;
			m_nImageHeight = iconInfo.yHotspot * 2;
			::DeleteObject(iconInfo.hbmMask);
			::DeleteObject(iconInfo.hbmColor);
			bReturn = m_imageList.Create (m_nImageWidth, m_nImageHeight, ILC_COLOR32 | ILC_MASK, 1, 1);
			if (TRUE == bReturn) {
				if (m_imageList.Add (m_hIcon) > -1) {
					m_bImageLoaded = TRUE;
				}
				else {
					m_bImageLoaded = FALSE;
				}
			}
		}
	}

	return bReturn;
}

Tomasz Sowinski7-Aug-01 9:23

7-Aug-01 9:23

Two solutions are possible:

1) you can use ImageList_GetImageInfo or CImageList::GetImageInfo. This gives you underlying HBITMAP (all images in the list stored on single bitmap), which you can pass to DrawState. You should perform this on a copy of original imagelist, but that's an easy part - just use ImageList_Copy or its MFC counterpart.

2) you have icon/bitmap handle in SetButtonXXX methods. For each 'source' image create appropriate 'disabled' one, then add this to second imglist.

Tomasz Sowinski -- http://www.shooltz.com

Derek Lakin8-Aug-01 2:08

8-Aug-01 2:08

Thanks for sticking with me on this one Smile | :)

In SetButtonIcon I have the following to create a copy of the bitmap:

IMAGEINFO imgInfo;
m_imageList.GetImageInfo (0, &imgInfo);
m_hbmpDisabled = (HBITMAP)::CopyImage (imgInfo.hbmImage, IMAGE_BITMAP, 
    m_nImageWidth, m_nImageHeight, LR_COPYDELETEORG);

Then in DrawItem I use the following to draw it as a disabled image:

pDC->DrawState (CPoint (3, 3), CSize (m_nImageWidth, m_nImageHeight),
    m_hbmpDisabled, DST_BITMAP | DSS_DISABLED);

Unfortunately this just draws a grey square, rather than the disabled image. The SetButtonBitmap function uses a similar process, but uses CreateMappedBitmap to map the mask colour to white. This bitmap is then copied into m_hbmpDisabled using ::CopyImage.

Presumably this is the step that is missing in SetButtonIcon, but how can I use CreateMappedBitmap without a bitmap resource id?

Derek Lakin.
Salamander Software Ltd.

Tomasz Sowinski8-Aug-01 2:25

8-Aug-01 2:25

So SetButtonBitmap works OK? If yes, you should try to pass DST_ICON flag to DrawState inside SetButtonIcon. No CopyImage call would be required in this case.

Tomasz Sowinski -- http://www.shooltz.com

Derek Lakin9-Aug-01 1:29

Urgent - read MAC address ?!?!?!?!

9-Aug-01 1:29

Thanks for your email yesterday.

Finally I've got it cracked Smile | :)

I add the bitmap ot icon into the image list in SetButtonBitmap or SetButtonIcon respectively, and then in DrawItem I use ExtractIcon and treat any image in the image list, regardless of source, as an icon. That way I don't need to worry about a copy of the bitmap or anything. This opens the door to multiple images Smile | :)

I feel like I've broken the back of this project. Hopefully before long I'll publish the article and code.

Thanks for your help.

Derek Lakin.
Salamander Software Ltd.

sql connect

6-Aug-01 23:38

Hello,

Please can you help me to know what is the function to use to connect to a microsoft SQL server, and also how to put data into it.

It would be even better if you just point me a link where there is information about connecting to a MSSQL database gor beginners,

Thank you.

-Ali

Re: sql connect

7-Aug-01 0:39

You can find a sample apps in the SQL Server's sample directory. (/Microsoft SQL Server/80/Tools/DevTools/Samples/ado - for example). There is a lot more

6-Aug-01 23:08

I have to read the MAC addresses in our LAN, but I didn't know how. I know that there is something with NetBIOS, but nothing more. Please, somebody ... HELP !!!!! Confused | :confused:

Re: Urgent - read MAC address ?!?!?!?!

Ryszard Krakowiak7-Aug-01 2:40

Ryszard Krakowiak

7-Aug-01 2:40

http://www.codeproject.com/useritems/getmac.asp

Re: Re: Urgent - read MAC address ?!?!?!?!

7-Aug-01 6:24

Thanx !!!

Custom attribute to the file

vikram_barate6-Aug-01 23:00

vikram_barate

6-Aug-01 23:00

Hello,
I will like to know, is there any custom attribute facility available for file in NTFS.
I want to assign my own data with he file. And want to store it as custom attribute.
If there is any such way then, please tell me whether there is any direct API to do so.

Thank you.

Re: Custom attribute to the file

Tomasz Sowinski7-Aug-01 0:44