C / C++ / MFC

Re: How to write Active x in VC++

21-Apr-08 20:39

See Creating ActiveX Components in C++[^].

lgatcodeproject22-Apr-08 0:33

lgatcodeproject

22-Apr-08 0:33

Hi!
Thanks for the link. It was quite informative.

Regards,
LG

lgatcodeproject

Re: How to write Active x in VC++

Hamid_RT22-Apr-08 0:50

CStatic::SetIcon Transparent.

22-Apr-08 0:50

I glad it was helpful for you.

Paresh Chitte21-Apr-08 19:59

21-Apr-08 19:59

Hi,

I am using the API CStatic::SetIcon to associate the icon with the static control. I have placed this control on CDialog, (Dialog background is gradient painted). I want this CStatic control to be transparent (so that the background of CStatic would be gradient, which is of Dialogs background color). However, icon image is transparent. How could I do this ?

Any help would be highly appreciated.

Thanks,
Paresh.

Hamid_RT21-Apr-08 20:06

21-Apr-08 20:06

See http://www.codeproject.com/KB/static/transparentstatic.aspx[^] does helpful?

Paresh Chitte21-Apr-08 20:30

21-Apr-08 20:30

Hi Hamid,

I have seen this article and this does not serve my purpose.

Regards,
Paresh.

Rajkumar R21-Apr-08 21:39

21-Apr-08 21:39

I think you need to paint alpha blended explicitly, AlphaBlend[^] and make sure you handled OnEraseBkgnd so that Static control doesnot painted its own background

have a look at Using the AlphaBlend function[^]

Paresh Chitte22-Apr-08 0:09

22-Apr-08 0:09

Thanks Rajkumar,

AlphaBlend works for bitmaps.
I have to use icons.

Regards
Paresh

Rajkumar R22-Apr-08 2:19

22-Apr-08 2:19

before that, I would like to know what is the result when you tried with your code.

Paresh Chitte22-Apr-08 18:07

22-Apr-08 18:07

class CMyDialog : public CDialog<br />
{<br />
 ........<br />
 CStatic m_StaticIcon;<br />
 ........<br />
}<br />
<br />
HBRUSH CMyDialog:OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) <br />
{<br />
 HBRUSH hbr = CDialog:OnCtlColor(pDC, pWnd, nCtlColor);<br />
 <br />
 switch(nCtlColor)<br />
 {<br />
 case CTLCOLOR_STATIC:<br />
  if (pWnd->m_hWnd == m_StaticIcon.m_hWnd)<br />
  {<br />
   pDC->SetBkMode(TRANSPARENT);<br />
   return (HBRUSH)(GetStockObject(NULL_BRUSH));<br />
  }<br />
  break;<br />
 }<br />
 return hbr;<br />
}<br />
<br />
<br />
BOOL CMyDialog:OnInitDialog() <br />
{<br />
 .........<br />
 m_StaticIcon.Create(_T(""), WS_CHILD | WS_VISIBLE | SS_ICON, <br />
        CRect(0, 0, 0, 0), this);<br />
<br />
 HICON hIcon = ::LoadIcon(AfxGetResourceHandle(), MAKEINTRESOURCE(ICON_ID));<br />
 m_StaticIcon.SetIcon(hIcon);<br />
 .........<br />
}

In CMyDialog:OnPaint(), I have painted a region of CDialog with GradientFill(...), and on this area I want a static icon, which needs to be transparent. So that I can see the background of CStatic icon as gradient. But this icon has been painted with background of rest of dialog and not the region, which I have painted with GradientFill.

I hope I have mentioned the problem correctly.

Regards,

Paresh.

Rajkumar R22-Apr-08 19:19

22-Apr-08 19:19

I would suggest very simple approach as you want to display only the icon, use DrawIcon, inplace of doing a lot of stuff over CStatic.

1) add the icon as member variable.

class CMyDialog : public CDialog
{
........
  HICON m_hStaticIcon;// CStatic m_StaticIcon;
........
}

2) load the icon

BOOL CMyDialog:OnInitDialog() 
{
.........
 /*m_StaticIcon.Create(_T(""), WS_CHILD | WS_VISIBLE | SS_ICON, 
CRect(0, 0, 0, 0), this);*/

m_hStaticIcon = ::LoadIcon(AfxGetResourceHandle(), MAKEINTRESOURCE(ICON_ID));
/*m_StaticIcon.SetIcon(hIcon);*/
.........
}

Paresh Chitte wrote:
In CMyDialog:OnPaint(), I have painted a region of CDialog with GradientFill(...), and on this area I want a static icon,

3) Now you draw the icon over the painted region.

void CMyDialog::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting
                .....
                .....
	}
	else
	{
		CDialog::OnPaint();
		CClientDC dc(this);
                // you painted the region with gradient fill
                // after that draw the icon over the gradient region
		dc.DrawIcon(100, 100, m_hStaticIcon);
	}
}

Paresh Chitte23-Apr-08 1:08

23-Apr-08 1:08

Hi Rajkumar,

The solution you have provided is perfectly working for me.

Thank you very much for your kind help. Smile | :)

Regards,
Paresh.

ExitWindowsEx

john563221-Apr-08 19:37

john5632

21-Apr-08 19:37

Hi,

The below code is not working:
ExitWindowsEx(EWX_REBOOT|EWX_FORCE,0);

In which condition it may fail?

Hamid_RT21-Apr-08 19:47

21-Apr-08 19:47

Whats the return value ? and see A tool to perform automatic shutdown, log off or restart action[^].

john563221-Apr-08 20:13

john5632

21-Apr-08 20:13

Return value is 0. And I have checked this.

Rajkumar R21-Apr-08 20:19

21-Apr-08 20:19

not that, what's the return value of GetLastError().

possibly the privilege issue, The application must first enable the SE_SHUTDOWN_NAME privilege[^]

john563221-Apr-08 20:20

john5632

21-Apr-08 20:20

Using getLastError, I got the error 1314 (The required previlige is not held by the client). What it means?

Rajkumar R21-Apr-08 20:24

21-Apr-08 20:24

pther wrote:
What it means?

see my previous reply

Hamid_RT21-Apr-08 20:34

21-Apr-08 20:34

Did you see my link?

Com Ports

usyra4221-Apr-08 19:34

usyra42

21-Apr-08 19:34

Hello Friends,

Can anyone say how to find the number of ports and the name of ports such as COM1, COM2 etc in our PC using a VC++ program. I searched it everywhere, but i couldnt find a proper source code.
Can u please help in this..

usharani

Rajkumar R21-Apr-08 19:43

21-Apr-08 19:43

Serial ports. Enumeration [^] may be useful

usyra42 wrote:
searched it everywhere

usyra4221-Apr-08 20:35

usyra42

21-Apr-08 20:35

It is Very confusing because we dont have complete source code there .
Can u help me in this

usharani

Rajkumar R21-Apr-08 20:45

21-Apr-08 20:45

don't you have the implementation of BeginEnumeratePorts, EnumeratePortsNext, EndEnumeratePorts posted in the page itself.