Re: can i use InValidateRect() to refresh my desktop - C / C++ / MFC Discussion Boards

Re: New to VC++

Yulianto.2-Feb-05 14:39

Yulianto.

2-Feb-05 14:39

I would like to help. I can see the future now. "A new language is created by us", quoted from cnn.com.

<italic>Work hard and a bit of luck is the key to success.

You don`t need to be genius, to be rich.

use crystal report in visul c++(please help me)

javad_200531-Jan-05 19:29

javad_2005

31-Jan-05 19:29

how to show *.rpt in visul c++ or edit crystal report?
thank you.

can i use InValidateRect() to refresh my desktop

uday__m31-Jan-05 19:16

uday__m

31-Jan-05 19:16

hi all,
i do want to refresh my desktop or any open window .Can it be done using InvalidateRect().if so how ?.I have tried most of the options like update,redrawwindow..etc but no change.Iam working on Vc++ 6.0.
thanks in advance.
help required Confused | :confused:

ASAP.

udaykumar

Re: can i use InValidateRect() to refresh my desktop

ThatsAlok31-Jan-05 20:18

ThatsAlok

31-Jan-05 20:18

you can refresh your Desktop Window by sending

::PostMessage(::GetDesktopWindow(),WM_PAINT,0,0);

RECT rect,
 GetWindowRect(::GetDesktopWindow(),&rect);
 InvalidateRect(::GetDesktopWindow(),rect,TRUE);

i never tried that but hope that will work

"I Think this Will Help"
<h5
alok gupta="" <br=""> visit me at http://www.thisisalok.tk

Re: can i use InValidateRect() to refresh my desktop

uday__m31-Jan-05 22:10

uday__m

31-Jan-05 22:10

hi alok,
i really thank u for u r time .I am really very new to Vc++,hope iam not asking very silly questions. i added the code which u had sent but i was getting some errors like ...
error:GetWindowRect doesnt take 2 parameters
.....:
error C2660: 'InvalidateRect' : function does not take 3 parameters
.....
so i made some changes like ...
RECT rect;
RECT *lprect;
lprect = ▭
::GetWindowRect(::GetDesktopWindow(),&rect);
::InvalidateRect(::GetDesktopWindow(),rect,TRUE);
i am able to compile it ,but not able to achieve the refreshing of the desktop.
hoping 4 u r reply.
thanking u.
regards uday

udaykumar

Re: can i use InValidateRect() to refresh my desktop

Blake Miller1-Feb-05 4:45

Blake Miller

1-Feb-05 4:45

Try this instead, you were missing sending afddress of rectangle to InvalidateRect:

InvalidateRect(
HWND hWnd, // handle to window
CONST RECT* lpRect, // rectangle coordinates
BOOL bErase // erase state
);

RECT TheRect;<br />
HWND hDesktop = ::GetDesktopWindow();<br />
::GetWindowRect ( hDesktop, &TheRect );<br />
::InvalidateRect( hDesktop, &TheRect, TRUE );

If that does not do it for you, you can just invalidate entire client area of window:

::InvalidateRect( ::GetDesktopWindow(), NULL, TRUE );

Re: can i use InValidateRect() to refresh my desktop

uday__m1-Feb-05 16:22

uday__m

1-Feb-05 16:22

hi blake ,

thnx i lot 4 u r suggestion ,i was able to solve the issue by using

::InvalidateRect(0,0,TRUE);

but still i have a sillly doubt .... i work on Vc++ 6.0 & refering to the msdn ,in Msdn it states that InvalidRect supports only two parameters ,but that never works .can u just brief me about the difference b/w

::InvalidateRect();

InvalidateRect();

bcoz only the ::InvalidateRect works and not InvalidateRect().

thnx in advance

regards

uday
Big Grin | :-D

udaykumar

Re: can i use InValidateRect() to refresh my desktop

Blake Miller3-Feb-05 4:37

Blake Miller

3-Feb-05 4:37

When you are using MFC programs, typically the function without the colons means it will invoke the MFC version of the function – some function that is a member of an MFC or other C++ class will be invoked.

Smile | :)

CWnd::InvalidateRect

void InvalidateRect(<br />
   LPCRECT lpRect,<br />
   BOOL bErase = TRUE <br />
);

If you want to make sure you call the WIN32 API or GDI version of a function that has the same name as an MFC version of the function, then you put the two colons “::” in front of the function name.

This means the function is invoked at ‘global’ scope and not as a member function of some class.

Here is an example of calling it at global scope:

::InvalidateRect(<br />
  ::GetDesktopWindow(), // handle to window<br />
  NULL,                 // rectangle coordinates<br />
  TRUE                  // erase state<br />
);

Re: can i use InValidateRect() to refresh my desktop

uday__m3-Feb-05 17:36

uday__m

3-Feb-05 17:36

hi Blake,
Thnx a lot...It was really very kind of u!!!
Thnx again
regards
uday

Re: can i use InValidateRect() to refresh my desktop

uday__m3-Feb-05 17:45

uday__m

3-Feb-05 17:45

hi blake,
thnx a lot!!!It was really good.
thnx again.
regards
uday

Re: can i use InValidateRect() to refresh my desktop

Ryan Binns1-Feb-05 12:53

Ryan Binns

1-Feb-05 12:53

ThatsAlok wrote:
::PostMessage(::GetDesktopWindow(),WM_PAINT,0,0);

Bad idea. That will probably not work. If it does, then you're very lucky Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: can i use InValidateRect() to refresh my desktop

uday__m1-Feb-05 16:23

uday__m

1-Feb-05 16:23

hi Alok

,

thnx i lot 4 u r suggestion ,i was able to solve the issue by using

::InvalidateRect(0,0,TRUE);

but still i have a sillly doubt .... i work on Vc++ 6.0 & refering to the msdn ,in Msdn it states that InvalidRect supports only two parameters ,but that never works .can u just brief me about the difference b/w

::InvalidateRect();

InvalidateRect();

bcoz only the ::InvalidateRect works and not InvalidateRect().

thnx in advance

regards

uday

udaykumar

Re: can i use InValidateRect() to refresh my desktop

sushil sati17-Feb-10 21:08

sushil sati

17-Feb-10 21:08

if you want to refresh desktop
then use
SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, NULL, NULL);

sushil sati

i can not pass CStringArray from dll

vc-programmer-31-Jan-05 18:08

vc-programmer-

31-Jan-05 18:08

i can not pass CStringArray from dll....

my dll code here...................
My.h
----
MY_API CStringArray MyName;
MY_API void GetmyName(CStringArray _myname);

My.cpp
------
MY_API void GetmyName(CStringArray _myname)
{
for(int i=0;i

Re: i can not pass CStringArray from dll

Selvam R1-Feb-05 1:38

Selvam R

1-Feb-05 1:38

Hi,

Nice discussion about Pass CStringArray to DLL,

http://www.codeproject.com/dll/RegDLL.asp#xx1016379xx[^]

Regards,
Selvam

Re: i can not pass CStringArray from dll

Blake Miller1-Feb-05 4:51

Blake Miller

1-Feb-05 4:51

--OR-- Pass the CStringArray address instead of a COPY of the entire string array D'Oh! | :doh:

MY_API CStringArray MyName;
MY_API void GetmyName(CStringArray* _myname);

My.cpp
------
MY_API void GetmyName(CStringArray* _myname)
{
for(int i=0;i {
_myname->Add(MyName.GetAt(i));
}
}

typedef void (*EXTERNAL_NAME) (CStringArray* _myname);
EXTERNAL_NAME dll_myname;
----
---
--
--
CStringArray aa;
dll_myname(&aa);

for(int i=0;i {
m_ist.AddString(aa.GetAt(i));
}

Re:Debug Assertion Failed

vc-programmer-1-Feb-05 17:16

vc-programmer-

1-Feb-05 17:16

great!
this work ...
but i have problem..
i accepted result and then error appear...
i don't know what happen..
Debug Assertion Failed
Program:debug\My.exe
File:dbgheap.c
Line:1011

Expression:_CrtIsValidHeapPointer(pUserData)

Debug Assertion Failed

Program:debug\My.exe
File:dbgheap.c
Line:1076

Expression:_pFirstBlock(pHead)

Application Error
The instruction at "0x10008ba5" refrenced memory at "0xddddddf1":The memory could not be "read".

Re:Debug Assertion Failed

Blake Miller3-Feb-05 4:41

Blake Miller

3-Feb-05 4:41

Make sure the two files are matched as to their debug versus release builds.
You will get this very commonly if you built your DLL as DEBUG and your EXE as Release and then run them against each other.

The debug build's memory allocator will add extra memory checking data at head and tail of memory blocks, and the release build's memory allocator does not expect this extra data to be there.
Likewise, if memory is allocated by a release build and tested by a debug build, it fails because the memory block's header data appears to be corrupted.

Monitoring a process

SiddharthAtw31-Jan-05 18:06

SiddharthAtw

31-Jan-05 18:06

There is a critical service in my machine which crashes once in a month. I want to write an application which monitors that process and if that crashes sends email, or SMS or if possible restarts the service.

I am trying with Enumerating Process <process.h> . But that doesn't seem to be the solution.

thanx in advance

Re: Monitoring a process

rwestgraham31-Jan-05 18:50

rwestgraham

31-Jan-05 18:50

Create a watchdog app. Find the handle to the process you need to monitor. Then go into a WaitForSingleObject state. Set a time limit and let the watchdog app time out and process messages occasionally in case you want to shut it down manually.

WaitForSingleObject returns a code that indicates the condition under which the function exits. If it timed out, the process is still running, so you clear the message queue and go back into WaitForSingleObject. If WaitForSingleObject exits because the process ended you send the e-mail, do whatever.

Robert

Re: Monitoring a process

Blake Miller1-Feb-05 4:54

Blake Miller

1-Feb-05 4:54

Assuming the 'crash' means that the process being monitored has termianted. This will not detect if it has locked up or not - it is still 'running' but uselessly deadlocked or stuck in a loop.
If the monitored process is running as a service, you can periodically query the service control manager to get the service status, too.

Automation Server

Anonymous31-Jan-05 18:05

Anonymous

31-Jan-05 18:05

Hi,

I am creating an application, and I would like implement it as an out-of process automation server ( EXE ). I succeeded in doing that, But I have another requirement, which is to make the application singleton. That is, whenever the application is running, and if a request comes in to create an object of the application using say,

Set obj = CreateObject("xxx.yyy")

Then it should return the instance of the currently running application, instead of creating a new one. Could anyone pl. guide me in acheiving this.
Also, It would be really helpful, if you can give me the link to some sample pgms.

Thanks and Regards
Micheal

CComboBox Properties

LighthouseJ31-Jan-05 17:17

LighthouseJ

31-Jan-05 17:17

I restarted the program I'm working on so it's built on MFC wizards now so new dialogs are easy to integrate into the project. Anywho, how I can disable a combo box? I created a control variable to the combo box but I don't see a function do disable it (and re-enable it later) in code, I only see the option in the Behavior section of the properties window if I select it in the dialog designer mode. I've been looking all around the help files and Google but nothing has surfaced or at least nothing that pops at me.

Re: CComboBox Properties

Ryan Binns31-Jan-05 17:56

Ryan Binns

31-Jan-05 17:56

EnableWindow()

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: CComboBox Properties

LighthouseJ31-Jan-05 18:01

LighthouseJ

31-Jan-05 18:01

Of course I missed that function, now I gotta figure out this data exchange...

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.