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If the background brush is null then nothing will draw in the client
area of the window unless YOU draw it. You can do that in response to
the WM_ERASEBKGND (typically) or WM_PAINT message.
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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am i being thick or is it no one is understanding me
I have a background
I have child windows
how do i force them to redraw when i set the focus
the imprint of the form that sits infront of the one i click, is still there, its a refresh problem,
can anyone please just tell me the code to just redraw/refresh the whole lot.
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I already stated:
The system will send the appropriate messages. If it's not redrawing properly
you are doing something wrong.
I suppose you could try to figure out all the possible messages
received when your window gets focused/activated and force an
invalidate/update/redraw but it would be a hack covering up an existing
problem. Even then, I doubt it would redraw properly since it already isn't.
Back to the drawing: AFAIK, and I could be wrong, you stated the
background brush for the window class is NULL, you have no WM_ERASEBKGND
handler, and WM_PAINT handler does nothing. What do you expect to be drawn then?
Mark Salsbery
Microsoft MVP - Visual C++
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I said the hbrBackground Brush IS NOT NULL as in it has a value
i dont have WMERASEBKGND or WM_PAINT at the moment but the background is being drawn
ill go through whats happeneing properly
i create a child window(window 1)
i then create another child window(window 2) and place half of that over (window 1)
i then click and drag the (window 1) from behind
and where (window 2) overlapped (window 1) it is still being drawn on (window 1)
They both have backgrounds, i just need something to refresh, i do all my windows the same way and
it normally works, its just when i made these child forms they dont do it anymore.
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Sarriss wrote: said the hbrBackground Brush IS NOT NULL as in it has a value
My mistake, sorry. And the value is valid? 
Sarriss wrote: its just when i made these child forms they dont do it anymore.
Then something is done wrong. The system will send the appropriate
messages to refresh the exposed areas of windows.
What does the window class and window procedure look like for the
window that's not refreshing properly?
Mark Salsbery
Microsoft MVP - Visual C++
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Also, what are the window style flags used to create the windows?
Mark Salsbery
Microsoft MVP - Visual C++
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Here is the register
void RegWnd::RegChildWindow(HINSTANCE hInstance, char *ClassName, WNDPROC WndProc, LPCTSTR MenuName)
{
wcc.cbSize = sizeof(WNDCLASSEX);
wcc.style = CS_VREDRAW|CS_HREDRAW|CS_DBLCLKS;
wcc.lpfnWndProc = WndProc;
wcc.cbClsExtra = 0;
wcc.cbWndExtra = 0;
wcc.hInstance = hInstance;
wcc.hIcon = static_cast<hicon>(LoadImage( hInstance,
MAKEINTRESOURCE(IDI_MAIN),
IMAGE_ICON,
255,
255,
LR_DEFAULTCOLOR));
wcc.hCursor = LoadCursor(NULL, IDC_ARROW);
wcc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcc.lpszMenuName = MenuName;
wcc.lpszClassName = ClassName;
wcc.hIconSm = static_cast<hicon>(LoadImage( hInstance,
MAKEINTRESOURCE(IDI_MAIN),
IMAGE_ICON,
16,
16,
LR_DEFAULTCOLOR));
}</hicon></hicon>
here is the create
HWND CreateChild(HINSTANCE hInstance,
LPCTSTR ClassName,
LPCTSTR WndName,
HWND parent,
DWORD dStyle = WS_OVERLAPPEDWINDOW|WS_CHILD,
DWORD dXStyle = 0L,
int xPos = CW_USEDEFAULT,
int yPos = CW_USEDEFAULT,
int Width = 400,
int height = 400);
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Try adding the WS_CLIPSIBLINGS style to the child windows.
Also, you may find adding the WS_CLIPCHILDREN flag to the parent window
results in more pleasing updates during resizing (the children won't flicker).
You may get better results using overlapped windows as child windows if you
use the Multiple Document Interface[^].
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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well im trying to stay form MDI thats the whole point of this exercise 
those two did how ever stop the issue now it keeps the window behind the other till i let go, presumably need to put a refresh on the WM_LBUTTONDOWN but thats an issue i can ignore for now thank you for your help mate
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Hi
I want to create directory in hierarcy. For example I want to create c:\Test\Temp directory. Both test and temp directory do not exist.
Thanks
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and what have you tried so far to achieve this ?
have you searched MSDN ?
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I bet what he's looking for is an obscure function called something like ::DoMySpecialThingRightNow() instead of an intuitive name like ::CreateDirectory()....
I mean, who would ever think of that... 
"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown
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certainly 
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Well CreateDirectory is useless. He actually needs CreateDirectoryHierarchy...
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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Hi,
CreateDirectory does not create directory hierarchy. I would have to create each directory in hierarchy. I got solution. MakeSureDirectoryPathExists creates directory hierarchy.
Thanks
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Hi,
Actually CreateDirectory does not create all directories in hierarchy. I solved this problem by using MakeSureDirectoryPathExists.
Thanks.
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Hi,
I got the solution. I use MakeSureDirectoryPathExists API. Thanks for your response.
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There's a lot of hard ways to do it...
I prefer simple:
::SHCreateDirectory(NULL, L"c:\\Test\\Temp");
*edit* While easy, I just noticed SHCreateDirectory[Ex] is deprecated.<br />
<br />
Bummer.
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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Hi,
I used 'SHCreateDirectory' but got 'SHCreateDirectory': undeclared identifier. CreateDirectory API does not suite to my requirement becuase it creates directory only if parent directory exist. I got MakeSureDirectoryPathExists API which fulfil my requirements. Thanks for your help.
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Can you more explain because your answer is easy and you can saw some answers of friends?
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Hi Hamid,
Actually I want to create directory hierarcy using one api. CreateDirectory does not create directory hierarchy. I got MakeSureDirectoryPathExists API. If fulfils my requirement.
Thanks
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Please find the code below
Using System.IO;
//for creating the directory
Directory.CreateDirectory("c:\\Test");
Directory.CreateDirectory("c:\\Test\\Temp");
Cheers!!
Brij
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Hi,
I was looking for WIN32 API. I got MakeSureDirectoryPathExists API. Thanks for your help.
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I am trying to read binary data from a TCP socket using recv() but getting return value as -1 for recv() and errno as WSAECONNABORTED (10053). recv() is reading if server is sending data in character format but when I try to read binary data it fails, I also tried to read into a structure defined for the binary data that I am supposed to recieve but also no luck. Please help me as I have already taken a month to debug and now I am left with nearly no time and having no clue that why I am unable to read binary data into a character array and wat other way I can do it.
char recvbuf[512];
int msgtype;
for(;;)
{
//Reading Message
bytesRecv = recv(conn, recvbuf, 512, 0);
s.Format("Message %s", recvbuf);
m_list.AddString(s);
}
modified on Wednesday, October 1, 2008 7:48 AM
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