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I use memory mapped files to do exactly this in several places in our [XP embedded based] system. (The trick is to use a mutex to ensure that only one instance does the initializing and the rest just open the memory mapped file.)
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It's not particularly necessary that each instance of the dll share a particular variable - I could instead have each instance of the dll send a message to my application (which loads the dll) and have my app use the message to add the new value to the end of the list. How does that sound?
I'm attempting to simulate input latency by installing a keyboard and mouse hook that records all input, blocks it, and then resends it after a specified interval. I'll probably have trouble differentiating between messages I'm recieving from the system, and messages that I have forwarded after the appropriate interval, however that is a river I'll have to cross when I get to it.
So I guess I'll see what I can do about forwarding the messages directly to my application, where they will then be pushed onto a list (it should be a fairly trivial matter)
edit: is there any way at all I can send a message using the win32 SendMessage() along with some user data, like a flag? It would make my life a hell of a lot easier :P
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Sauce! wrote: is there any way at all I can send a message using the win32 SendMessage() along with some user data, like a flag?
If your data is two DWORDs or less (and WPARAM and LPARAM), just use a WM_USER message or see RegisterWindowMessage(). If longer, use WM_COPYDATA.
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Unfortunately the data is larger than a DWORD or two, and I'm not sure I can use WM_COPYDATA either, as MSDN advises against passing pointers between processes (and dll instances) - with COPYDATASTRUCT using pointers to do it's thing, it pretty much counts it out.
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I am creating an background application which runs in the background, for that i want to know which key has been pressed by user. Right now, i am using this code:
while( 1 )
{
for( int i = 0; i < 256; i++ )
{
GetAsyncKeyState( i );
}
}
But, due to while( 1 ) other applications are hanging. Is there any alternative for GetAsyncKeyState( int ) function OR can i use the same function in another way?
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You should use a global keyboard hook (see: "Using Hooks") for the purpose.
Are you writing a keylogger?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Thanks for your reply Pallini. I was curious about how keylogger works and while searching, i got a keylogger code in c++. Now i am just trying to edit it, just for a learning purpose.
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Here's some neat theory on hooks and DLLs and a practical example to illustrate it all, by Dr. Joseph Newcomer: Hooks and DLLs[^]
“Follow your bliss.” – Joseph Campbell
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I see you already found a better way to do what you want, so this is just an "additional footnote" to your original problem: to make your while loop less CPU hungry you can add a Sleep(1) call somewhere inside it, or maybe use SwithToThread[^] (althorough SwitchTothread seems to be much less effective than Sleep), this way the loop yields execution to other threads and does not eat up all the CPU power. I mean something like:
while( 1 )
{
for( int i = 0; i < 256; i++ )
{
GetAsyncKeyState( i );
}
Sleep(1);
}
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <
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i have created two modeless dailog and invoking it in InitInstance().
That two dialog is displayed correctly.But what happened is, the second dialog creates icon in Taskbar like main applcation seperatley apart form main application.It has its own close,Move menu option.
How its possible.I posted my code below.
In InitInstance()
pMainFrame->AlarmBanner();
pMainFrame->ToolTab();
void CMainFrame::AlarmBanner()
{
CAlarmBanner *oAbanner;
oAbanner = new CAlarmBanner;
oAbanner->Create(IDD_ALARMBANNER,this);
oAbanner->ShowWindow(SW_NORMAL);
}
void CMainFrame::ToolTab()
{
CToolTab *otoolbar;
otoolbar = new CToolTab;
otoolbar->Create(IDD_TOOLBAR_DIALOG,this);
otoolbar->ShowWindow(SW_NORMAL);
}
BOOL CToolTab::OnInitDialog()
{
CDialog::OnInitDialog();
m_brush.CreateSolidBrush(RGB(173, 216, 230));
SetWindowPos(&CWnd::wndBottom,0,80,45,SystemDM.dmPelsHeight,SWP_SHOWWINDOW);
return TRUE;
}
BOOL CAlarmBanner::OnInitDialog()
{
CDialog::OnInitDialog();
SetWindowPos(&CWnd::wndBottom,0,0, SystemDM.dmPelsWidth, SystemDM.dmPelsHeight/12, SWP_SHOWWINDOW);
return TRUE;
}
Anu
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The 2nd dialog may have the 'Application Window' property set TRUE. Check the dialog properties and make sure this value is set to FALSE.
L u n a t i c F r i n g e
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Yes.
Thank you so much
Anu
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Hi,
I edited OnGetMaxMininfo() function to change display size when i maximize the child window like below
int XBorder = GetSystemMetrics(SM_CXMAXIMIZED);
int YBorder = GetSystemMetrics(SM_CYMAXIMIZED);
lpMMI->ptMaxTrackSize.x = XBorder-50;
lpMMI->ptMaxTrackSize.y = YBorder-40;
It comes fine.But what i want is the position of window is from 50,50
Ex:
Left :50,Top:50,Width:XBorder-50,Height:Border-40
How can i get that?
I use
lpMMI->ptMaxPosition.x=50;
lpMMI->ptMaxPosition.y=50;
But no use?
Pls help me.
Anu
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Cannot understand your question, could you please elaborate a bit?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Im my applcation constanly im placing one dialog at top of the screen.So if i maximize my child windows definetly quater of child frame will get hide behind the dialog.To overcome this problem i planed that when i maximize the child frame,then it maximized to full window but top of the window should below the dialog.
Can u understand my point.
Anu
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Can't you use the SetWindowPos (and optionally play with the Z-Order) for the one being Maximized? Or does this not fill your requirements?
Regards.
--------
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpfull answers is nice, but saying thanks can be even nicer.
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Cannot you just handle WM_SIZE message, sizing your window height to screen height minus the dialog's height (and moving it at the bottom of the dialog) on maximize request?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Yes,
I used that one also.I can get my required window size.But in that maximized window, the title of my child window,system menu,staus bar all are missing.simpla window without caption,without mimnimize,maximize bar is get displayed.When i double click on the bar,then the window comes to previous position with caption and system menu.
I coded like this
void CChildFrame::OnSize(UINT nType, int cx, int cy)
{
CMDIChildWnd::OnSize(nType, cx, cy);
int XBorder = GetSystemMetrics(SM_CXMAXIMIZED);
int YBorder = GetSystemMetrics(SM_CYMAXIMIZED);
switch (nType)
{
case SIZE_MAXIMIZED:
MoveWindow(40,60,XBorder-50,YBorder-40,FALSE);
break;
}
}
Anu
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Why don't you use the size of the (top) dialog to accordingly resize your frame window?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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I couldnot get you point?
Anu
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You said you have a dialog box at the top of the screen. In order to make your frame window appear just below it, you must know (and use) the dialog's height, or am I wrong?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Can someone clarify me the following question - unfortunately I cannot understand it from MSDN docs. There are several messaging libraries in Windows - see http://msdn.microsoft.com/en-us/library/ee663283(VS.85).aspx. The question is: can some of them be used to the following task: to read mails from POP3 mailbox on ANY (not only Microsoft Exchange Server) mail server? For instance, I see on http://msdn.microsoft.com/en-us/library/ms710599(VS.85).aspx description of some IPOP3Transport interface, but with remark 'Do not use'. "http://msdn.microsoft.com/en-us/library/ms709613(VS.85).aspx" says "New applications should not use this set of interfaces and schemas. These interfaces and schemas exist for backward compatibility with legacy applications".
So, this "Windows Mail" is obsolete and should not be used anymore? I am confused. Can someone explain me?
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Personally I keep far away from 'MS solutions' for just the reasons you described. What i did (years ago) open a socket and read the mail. The Pop3 protocol is really simple.. Next, you will get your emails as files and you have to get bodies and attachments out. Pop3 and the email format is described and available on internet, open for us all.
Besides of some nasty 'ms-enhancements' in the email adresses, email is pretty standard.
I read the pages you provided: forget it they are just wrappers around the real thing. If you do not want to follow my advice above use the mail-classes of your programming language, they should be reasonably standard.
Send me a private mail if you need more advice...
Rozis
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Hi All,
At one place in my code i need to run IOCTL_DISK_DELETE_DRIVE_LAYOUT, that execute smoothly. This IOCTL code make the disk signature as zero so it can not be initialize.
I need to initialize this disk using code. Is there any API or any function that can initialize the disk?
Please suggest me some way to initialize it using c++ code.
Thanks
MChauhan
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What you want to Initialize?
Величие не Бога может быть недооценена.
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