C / C++ / MFC

Minimize application from taskbar

4-Jun-06 17:35

Check for WM_SYSCOMMAND and then SC_CLOSE.

When you click on those buttons on the title bar a WM_SYSCOMMAND is generated. Now what kind of event happened is determined by the wParam parameter. Check the wParam parameter to find out if X (SC_CLOSE) was clicked.

Here is a sample done with WindowProc...

LRESULT CVolMacDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 
{
	if( message == WM_SYSCOMMAND && wParam == SC_CLOSE )
	{
		if( MessageBox(_T( "Are you sure you want to quit?" ), _T( "Prompt?" ), MB_YESNO ) == IDNO)
			return 0;
	}
		
	return CDialog::WindowProc(message, wParam, lParam);
}

Well this is done with a dialog, it will work with views too but it will require some additional housekeeping too. Hope this helps.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Handle exit

FarPointer4-Jun-06 20:49

FarPointer

4-Jun-06 20:49

Hi ,
Check this out :-
(In Pretranslate Message)
if ( pMsg->message == WM_NCLBUTTONDOWN) // non client LButton Down
{
if ( pMsg->wParam == HTCLOSE) // the close button is going to be pressed
{

}
}

Regards,
FarPointer

Junyor4-Jun-06 8:20

Junyor

4-Jun-06 8:20

I have a dialog box with the Title Bar setting set to False. This means that the Minimize Bar setting is False as well. This is why I can't minimize the application when I click on the icon task bar, but I would like this to happen.Any suggestions? Confused | :confused:

Thank you!

Re: Minimize application from taskbar

Nibu babu thomas4-Jun-06 17:37

Re: Minimize application from taskbar

4-Jun-06 17:37

Junyor wrote:
This is why I can't minimize the application when I click on the icon task bar, but I would like this to happen.Any suggestions?

You can send a WM_SYSCOMMAND message with wParam parameter set to SC_MINIMIZE. Unsure | :~

Nibu thomas
A Developer

Programming tips[^] My site[^]

helpcode4-Jun-06 23:51

helpcode

4-Jun-06 23:51

i hope this code might be helpful to u.
bool bClientWinState = false;//define and declare this variable in OninitDialog(); of your application. handle the OnNotifyIcon event like this:
LRESULT CMyApplication::OnNotifyIcon(WPARAM wParam, LPARAM lParam)
{
UINT uID;
UINT uMouseMsg;

uID = (UINT) wParam;
uMouseMsg = (UINT) lParam;

if ((uMouseMsg == WM_LBUTTONDOWN) || (uMouseMsg == WM_LBUTTONDBLCLK))
{
if(bClientWinState)
{
AfxGetApp()->m_pMainWnd->ShowWindow(SW_RESTORE);
AfxGetApp()->m_pMainWnd->SetForegroundWindow();
bClientWinState = false;
}
else
{
AfxGetApp()->m_pMainWnd->ShowWindow(SW_MINIMIZE);
this->ShowWindow(SW_HIDE);
bClientWinState = true;
}

}

]

jiteen tilekar
Siemens Info. systems Ltd., Pune

Re: Minimize application from taskbar

NianHawk17-Jun-06 5:08

How to lock taskbar in my program

17-Jun-06 5:08

good idea, just what's the message number of clicking the icon in the taskbar instead of system tray area. I think we need to respond
the message to minimize our application.

Nothing impossible, Nothing sure

Re: print a bitmap

Hamid_RT4-Jun-06 7:12

Hamid_RT

4-Jun-06 7:12

I answer to your question in previous message

whitesky

NianHawk4-Jun-06 3:08

4-Jun-06 3:08

As you know, we can lock taskbar manually, But I would like to lock taskbar by my own program. I try to do it by the following code:

DWORD style = GetWindowLong(hShellTrayWnd,GWL_STYLE);
style &= ~WS_SIZEBOX;
SetWindowLong(hShellTrayWnd, GWL_STYLE, style);

Unfortunately, it didn't work as I expected. Does anyone know how to do it?
Your help would be greatly appreciated.

Nothing impossible, Nothing sure

Nibu babu thomas4-Jun-06 18:13

4-Jun-06 18:13

I did do it sometime back but don't have the message number with me now. D'Oh! | :doh:

Maybe I can give it you tomorrow.

This requires you to send a message to the taskbar asking it to lock itself. I did have the number but don't have it now. Smile | :)

Nibu thomas
A Developer

Programming tips[^] My site[^]

NianHawk7-Jun-06 6:38

7-Jun-06 6:38

Hi Tomas,
Your help would be greatly appreciated, in fact I send WM+USER+336 to taskbar, but it didn't work, which make me feel that it can't be done by sending a message.

And then I try another way below:
CToolBar* trayWnd = (CToolBar*)FromHandle(hShellTrayWnd);
DWORD barStyle = trayWnd->GetBarStyle();
barStyle |= CBRS_SIZE_FIXED;
trayWnd->SetBarStyle(barStyle);

It also didn't work, I was really frustrated, the style of taskbar vary every time even though I remove "trayWnd->SetBarStyle(barStyle)".
For example, sometimes barStyle is 380, but sometimes it is 376, and other times, it is another value. it is very strange for me.

Nothing impossible, Nothing sure

Nibu babu thomas7-Jun-06 17:38

7-Jun-06 17:38

NianHawk wrote:
Hi Tomas,
Your help would be greatly appreciated, in fact I send WM+USER+336 to taskbar, but it didn't work, which make me feel that it can't be done by sending a message.

Thanks.

This works on both Windows XP, 2000...

//custom message
#define <code>WM_USERDEF_LOCKTASKBAR </code>424

static HWND hShellWnd = ::FindWindow(_T("Shell_TrayWnd"), NULL);
        
if(hShellWnd != NULL)
  ::PostMessage(hShellWnd, WM_COMMAND, MAKELONG(<code>WM_USERDEF_LOCKTASKBAR</code>, 0), NULL);	
else
  hShellWnd = ::FindWindow(_T("Shell_TrayWnd"), NULL);

This will work! Smile | :)

Nibu thomas
A Developer

Programming tips[^] My site[^]

NianHawk7-Jun-06 19:22

7-Jun-06 19:22

It did work well, thank a lot. I have another question if you wouldn't feel disturbed, Actually I use spy to monitor taskbar, if my program send such WM_COMMAND msg to taskbar, spy can capture it.
But if I do it manually by using winxp functionality, spy didn't show this msg, that is why I always can't get this msg. Could you be so kind to teach me something about it?

Nothing impossible, Nothing sure

Nibu babu thomas7-Jun-06 19:30

7-Jun-06 19:30

NianHawk wrote:
It did work well, thank a lot.

You are Welcome Smile | :)

NianHawk wrote:
I have another question if you wouldn't feel disturbed,

Not at all.

NianHawk wrote:
Actually I use spy to monitor taskbar, if my program send such WM_COMMAND msg to taskbar, spy can capture it.
But if I do it manually by using winxp functionality,

Which functionality! Unsure | :~

NianHawk wrote:
Could you be so kind to teach me something about it?

Can you give me your email. I can send you a sample application, which demonstrates some useful messages related to the TaskBar.

BTW here is a list if you are interested...

/*DisplayStartupMenu*/		305,
/*DisplayRunDialog*/		401,
/*DisplayLogoffDialog*/		402,
/*ArrangeCascade*/		403,
/*ArrangeTileHrz*/		404,
/*ArrangeTileVrt*/		405,
/*ShowDesktop*/			407,
/*ShowDateTimeDialog*/		408,
/*ShowTaskbarPrps*/		413,
/*MinAll*/			415,
/*MaxAll*/			416,
/*ShowDesktop2*/		419, /*Well you need to check this one. Make sure is this minimize all or show desktop.*/
/*ShowTaskMngr	*/		420,
/*TaskBrCustomizeNtfy*/		421,
/*LockTaskbar*/			424,
/*HelpAndSuppCenter*/		503,
/*ControlPanel*/		505,
/*TurnOffCompDialog*/		506,
/*PrintersAndFaxesDialog*/	510,
/*FindFilesDialog*/		41093,
/*FindComputers*/		41094

Nibu thomas
A Developer

Programming tips[^] My site[^]

NianHawk17-Jun-06 5:01

17-Jun-06 5:01

Thanks for your help.

I mis-thought there had not benn reply yet because I didn't receive the response mail as usual, maybe last time I missed to check "Notify me by e-mail if someone answers this message".

My email is : NianHawk@invalid.hotmail.com (please discard "invalid").

Which functionality!

===> I just lock the taskbar by taskbar menu.

Best regards.

Nothing impossible, Nothing sure

Nibu babu thomas18-Jun-06 17:19

18-Jun-06 17:19

NianHawk wrote:
Thanks for your help.

I mis-thought there had not benn reply yet because I didn't receive the response mail as usual, maybe last time I missed to check "Notify me by e-mail if someone answers this message".

My email is : NianHawk@invalid.hotmail.com (please discard "invalid").

Heh don't worry. I wrote an article on this subject. You can get the sample application from here[^]. Hope you will like it.

Nibu thomas
A Developer

Programming tips[^] My site[^]

NianHawk20-Jun-06 6:39