C / C++ / MFC

why RES file contain ICO file path?

4-Dec-09 3:41

Erik wrote:
is there a way to know that variable in the same process right after it has been created?

Is it responding to the WM_SETTINGCHANGE message?

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HOW WHAT3-Dec-09 17:06

HOW WHAT

3-Dec-09 17:06

use DDK, build resource file (only a ICO file) , but sys file( or res file ) contain "c:\sample\resouce\sample.ico" strings, why ? how to remove it? thanks.

Re: why RES file contain ICO file path? [modified]

Adam Roderick J3-Dec-09 17:14

Adam Roderick J

3-Dec-09 17:14

It is path of the resource in local machine.
res file is intermediate file so wont be a problem just refer [^]
It wont be problem as far as i know.

Величие не Бога может быть недооценена.

modified on Friday, December 4, 2009 12:03 AM

error LNK2001: unresolved external symbol _wWinMain@16

includeh103-Dec-09 15:32

includeh10

3-Dec-09 15:32

an unicode MFC project worked well before (VC6), but after I added some COM issues and #include <atlbase.h>, I got compile error:

libcmt.lib(wwincrt0.obj) : error LNK2001: unresolved external symbol _wWinMain@16

project settings are default except unicode info.

how to solve the problem?

thanks

modified on Thursday, December 3, 2009 9:39 PM

Re: error LNK2001: unresolved external symbol _wWinMain@16

David Crow3-Dec-09 16:02

Re: error LNK2001: unresolved external symbol _wWinMain@16

3-Dec-09 16:02

Have you checked here?

Adam Roderick J3-Dec-09 17:06

Adam Roderick J

3-Dec-09 17:06

Did u checked with the msdn on your machine with this link error.
Set 'wWinMainCRTStartup' on Project Settings-->Link-->Output-->Entry-point symbol:

Величие не Бога может быть недооценена.

load bitmap into memory [modified]

transoft3-Dec-09 11:54

transoft

3-Dec-09 11:54

Hi
My software needs a background bitmap image. User will frequently scroll the image. I want to load the bitmap image into memory. So the display performance will improve better.

What function will load bitmap into memory? I am using GDI plus.

void MyView::OnPaint( ... )
{
...
  Gdiplus::Graphics gr(dc);
  gr.SetPageUnit(Gdiplus::UnitPixel);
  gr.DrawImage(pBmp, p, 3);
...
}</pre>

Thanks, 

<div class="ForumMod">modified on Thursday, December 3, 2009 6:00 PM</div>

Re: load bitmap into memory

«_Superman_»3-Dec-09 13:04

Re: load bitmap into memory

3-Dec-09 13:04

You can use the Image class to load a bitmap from a file.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

transoft4-Dec-09 2:18

transoft

4-Dec-09 2:18

I already load image from a file. But it displays very slow. I want to load data into memory.

Thanks

How to measure program speed?

Grimes3-Dec-09 6:31

3-Dec-09 6:31

Hi there

Can someone please help me. I am looking for a way to measure the speed of my program's execution. I am busy writing a simulation that needs to run as fast as possible and I want to make sure that the algorithms used are the fastest possible. Is there a way or a tool that can be used to measure the speed, like the amount of CPU clock cycles needed to complete an algorithm.

thank you in advance.

Riaan.

KOM UIT DAAAAA!!!

David Crow3-Dec-09 6:38

3-Dec-09 6:38

Have you tried the profiler that comes with Visual Studio?

Grimes3-Dec-09 6:45

3-Dec-09 6:45

I am not that familiar with visual studio, but I see there is a reference in the help to the profiler. It seems that it would be able to do what I want. I will look in to the profiler.

Thanks for pointing me in the right direction!

KOM UIT DAAAAA!!!

«_Superman_»3-Dec-09 8:19

3-Dec-09 8:19

Not sure if this is what you want but you could use high resolution timer functions like QueryPerformanceCounter/QueryPerformanceFrequency before and after a piece of executing code and compare their values.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Grimes3-Dec-09 9:47

3-Dec-09 9:47

Hi
How would one use this?

QueryFrequencyCounter(Begin)
...CODE...
QueryFrequencyCounter(END)
TIME = END - BEGIN;

What is the unit of the counter? milliseconds or microseconds or clock cycles?

I will give it a try, thank you!

KOM UIT DAAAAA!!!

David Crow3-Dec-09 9:55

3-Dec-09 9:55

Grimes wrote:
What is the unit of the counter? milliseconds or microseconds or clock cycles?

See here and here.

«_Superman_»3-Dec-09 9:59

3-Dec-09 9:59

Here is an interesting blog - QueryPerformanceCounter counts elapsed time, not CPU cycles[^]

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Member 41945933-Dec-09 15:12

Member 4194593

3-Dec-09 15:12

Check the Masm32 forum. In the Laboratory there is a huge amount of information about timing, a Macro to set up the timing, and what it takes to get accurate results.

Grimes3-Dec-09 21:37

3-Dec-09 21:37

Thanks!!!

That counter macro seems to be counting the CPU cycles for a block of code. That does seem like the best way of determining the efficiency of a block of code, unlike time, that can vary greatly on different machines.

thanks for the help!

KOM UIT DAAAAA!!!

Using HDC thats NULL

dipuks3-Dec-09 6:06

dipuks

3-Dec-09 6:06

Hey

Can anyone tell what will happen if i use a HDC thats NULL?

For eg,

HDC hDc = {0};

DrawTextEx(hDc, ........);

I found that it will not throw an exception or something.

So is it OK to use like this?

Is there any MSDN documentation that talks about null HDC?

Thanks in advance

Re: Using HDC thats NULL

«_Superman_»3-Dec-09 6:15

3-Dec-09 6:15

That depends on the function you are using it in.
For example, the CreateCompatibleDC function says that if HDC is NULL it uses the current screen as the reference.

So if there is nothing mentioned about the behavior when HDC is NULL, if sure the behavior is undefined and you should not do that.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Using HDC thats NULL

dipuks3-Dec-09 7:17

dipuks

3-Dec-09 7:17

I am using HDC to write to a PDF printer. But the code is so entagled that, there's pieces of a text file writing code is also between that.

So when there's a case that only a text file need to be written and no PDF, then i pass the HDC for PDF as NULL.

So far in my testing i have seen that this works perfect.

Is there any other function that will return me a valid HDC, but will not mess up any text file writing?

Can i use CreateCompatibleDC to pass an HDC that will not mess up any other part of the application? But at the same time there will be a valid HDC rather than a NULL one.

Thanks

Re: Using HDC thats NULL

«_Superman_»3-Dec-09 7:55

Problem in running an application(developed in VC++ 2005) from windows service ..

3-Dec-09 7:55

I think I have too little understanding to give a reliable answer.
You will need to break up your question and isolate it from your domain if I need to understand.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

jain_MS3-Dec-09 5:27

jain_MS

3-Dec-09 5:27

Hi ,
While running an exe from service window , its throwing like

"The exception Unknown software exception (0x40000015) occurred in the application at location 0x781346b4."

Error 1067: the process terminated unexceptedly.

And in the Event viewer ...it is showing the message as ..

Faulting application mtserver.exe, version 6.2.86.0, faulting module msvcr80.dll, version 8.0.50727.4053, fault address 0x000046b4.

Note: its working fine in debug mode.

Please let me know ur valuable comments.

Ur help much appreciated

Regds
Jain

Re: Problem in running an application(developed in VC++ 2005) from windows service ..

«_Superman_»3-Dec-09 5:55