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....
My application draws a continous graph in a picture box treating it as a bitmap of width 600 pixels...once the area is filled...BitBlt function scrolls the graph towards left in order to continue drawing...problem is that if I try to scroll the graph MORE THAN 40 PIXELS .drawing area is not cleared properly....
what should be done
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Post the code, so we can tell what the problem is.
Christian Graus - Microsoft MVP - C++
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Raza5680 wrote:
problem is that if I try to scroll the graph MORE THAN 40 PIXELS .drawing area is not cleared properly....
Just a guess:
You need to invalidate the drawing area.
--
jlr
http://jlamas.blogspot.com/[^]
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I want to delete a file,but MFC shows shareviolet error
how can disable this error and delete that file?
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A file's color should have no bearing on whether it can be deleted or not. 
A sharing violation indicates that the file is in use by another process. Are you sure you still want to delete it?
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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How can i resize a dialog to fullscreen
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int x;
int y;
x = GetSystemMetrics(SM_CXSCREEN);
y = GetSystemMetrics(SM_CYSCREEN);
SetWindowPos(NULL,0,0,x,y,SWP_NOZORDER);
this is this.
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I want to get the workspaces path.GetCommandLine() only displays
the ....\debug\*.exe path.Please how can i get the *.dsw path where
the source files are kept
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use "GetCurrentDirectory"
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Can you tell me the most simplest way to change the CButton's back ground color.
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Handle the WM_CTLCOLOR message in your Dialog's class.
Einstein: "Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
My Articles
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i want to create the file using Cfile with the date i given.....
please kindly reply soon......
ditty grail
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You can't specify a date, but there are classes in MFC that allow you to set it afterwards. Damn[^], I thought it was seperate class, but it's a static method on the CFile class.
Which denies me the right to comment on the standard library having (overall) better file management mechanisms....
Christian Graus - Microsoft MVP - C++
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Can some one explain how the arc is created by CDC::Arc method . I just went through the MSDN documentation but cud not get it. Please help me. I will be thankful to him/her
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MFC includes the full source. Here it is:
BOOL CDC::ArcTo(int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4)
{
ASSERT(m_hDC != NULL);
BOOL bResult = ::ArcTo(m_hDC, x1, y1, x2, y2, x3, y3, x4, y4);
if (m_hDC != m_hAttribDC)
{
CPoint pt;
VERIFY(::GetCurrentPositionEx(m_hDC, &pt));
VERIFY(::MoveToEx(m_hAttribDC, pt.x, pt.y, NULL));
}
return bResult;
}
As you can see, it calls an internal API function, as much of the MFC GDI classes do. I suggest buying a maths book on the topic if you want to know more.
Christian Graus - Microsoft MVP - C++
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Well Thanx but the source code is of method "ArcTo" ... From where can I get source code of Arc ... Help me Please
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Well I want to know more ... So i shud buy a math book :P
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I created a row socket in order to send raw TCP data using following code:
SOCKET sRaw = socket(AF_INET,SOCK_RAW,IPPROTO_IP);
int flag = 1;
setsockopt(sRaw, IPPROTO_IP, IP_HDRINCL, (char*)&flag, sizeo(flag));
after i intialized buffer and dest address, i call sendto function send it:
int nRet = ::sendto(sRaw,
buff, sizeof(ipHeader) + sizeof(tcpHeader), 0, (sockaddr*)&in, sizeof(in));
if(nRet == SOCKET_ERROR)
{
printf(" sendto failed () %d \n", ::GetLastError());
return;
}
the result is sendto failed with error code : 10004.
Why? help me, tell me why, how can i send raw TCP data using raw socket.
my OS is Windows xp sp2.
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Microsoft have crippled the TCP implementation in SP2. Google groups is your friend.
Aaron.
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thank you very much.
does TCP implementation exist in SP1?
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Hello All,
I have a assignment something like this
LPTHREAD_START_ROUTINE a = ThreadProc;
Where ThreadProc is the thread function
After the above assignment a and ThreaProc shows different pointer value. Which is understandable.
My question is how do I get the ThreadProc pointer value back from a. How should my variable declaration look like
i.e if ThreadProc shows 0x00401028 in the watch window
and a shows 0x00401c90
then how do I obtain back 0x00401028 from a.
Rajdeep
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rajandpayal wrote:
I have a assignment something like this
LPTHREAD_START_ROUTINE a = ThreadProc;
Where ThreadProc is the thread function
After the above assignment a and ThreaProc shows different pointer value. Which is understandable.
i.e if ThreadProc shows 0x00401028 in the watch window
and a shows 0x00401c90
You saw that in a Debug build, right? In a Release build, a will most likely have the direct address of ThreadProc.
rajandpayal wrote:
then how do I obtain back 0x00401028 from a
In a Debug build, a will point to a JMP to ThreadProc instruction. You might inspect the memory pointed by a to obtain the JMP instruction (which comprises 5 bytes, if I remember well), and then decode the parameter, which would be the ThreadProc address...
But, I'm curious, why would you need that?
--
jlr
http://jlamas.blogspot.com/[^]
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I think this an easy one for an experienced VC++6 MFC person.
I'm using VC++6 MFC Forms project. Where is the proper place to initialize the controls on the Forms. (ie, making certain buttons visible/enabled and check boxes checke/not)
I'm thinking that either in the application or form .ccp file, but can't figure out where?
Thanks.
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Freddie Code wrote:
I'm using VC++6 MFC Forms project. Where is the proper place to initialize the controls on the Forms. (ie, making certain buttons visible/enabled and check boxes checke/not)
In your dialog class (derived from CDialog) you need to override OnInitDialog(). After calling the base class implementation, you can initialize your controls. Take a look at:
CDialog::OnInitDialog in MSDN[^]
--
jlr
http://jlamas.blogspot.com/[^]
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