Managed C++/CLI

Conversion From Int to Hwnd

6-Nov-07 4:13

minihotto wrote:
Do anybody know what's wrong?

Yes, mixed types are not supported. If you had studied C++/CLI, this means reading things likes books and articles you would know what that means. There is actually a great series of introductory articles on the subject right here on Code Project. I suggest you read them.

Re: Mixed types problem

minihotto7-Nov-07 2:41

minihotto

7-Nov-07 2:41

OK. THx.

narayanagvs5-Nov-07 18:44

narayanagvs

5-Nov-07 18:44

Hi,

I have to get handle for a process.I am doing as below.

Process^ pc = Process::Start("AcroRd32.exe", strCmdArgs);		
	IntPtr ProcHandle  = pc->Handle;
	HWND hwndProc = (HWND)ProcHandle.GetHashCode();
	HMENU hMenu = ::GetMenu((HWND)&hwndProc);

// When I debug Iam getting Undefined Value in hMenu.

Is my code correct? Any suggestions would be helpful.

Thanks

Today is a gift, that's why it is called the present.

Re: Conversion From Int to Hwnd

led mike6-Nov-07 4:18

6-Nov-07 4:18

narayanagvs wrote:
Is my code correct?

Just guessing... HWND hwndProc = (HWND)ProcHandle.GetHashCode();

That doesn't seem right to me, I don't remember ever using GetHashCode to obtain a HWND.

Warning C4945

Xpnctoc5-Nov-07 5:09

Xpnctoc

5-Nov-07 5:09

First, I know there is a known bug related to this warning message, and I know I have to call Microsoft to get the hotfix. My project is written in C++/CLI, with reference to 3 small C# DLLs. I've been working with the project for 6 months with NO warning messages. As soon as I installed VS 2008 Beta 2, BOOM! 350 warning messages, all C4945.

I am positive VS2008 is at fault, because on my other machine, which has ONLY VS2005, the project still builds with no errors.

Has anyone else ever encountered the same problem once VS2008 is installed? Does anyone know if uninstalling VS2008 will roll things back effectively enough to alleviate my problems? I'm just not excited about having to sit on hold with MS support for half an hour to get a hotfix because they're too darn stubborn to just post a !%@#($*&!@#($ download link.

Mark Salsbery5-Nov-07 6:13

5-Nov-07 6:13

If you can put together a small project that demonstrates/reproduces this as a legitimate
VS 2008 bug, I can forward it to MS for you. If it's a bug, this should be simple -
you know the symbols involved.

This issue is currently NOT reported for the VS 2008 Release Candidate, so if it's still
an issue, we should get it in there!

Also check and make sure you don't have a genuine namespace/symbol-name collision Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Xpnctoc5-Nov-07 7:32

Xpnctoc

5-Nov-07 7:32

Mark,

I appreciate the offer, but it sounds like I didn't clearly express my problem and suspicions.

I am not claiming to have found a VS2008 bug. My idea is that the VS2008 INSTALLER somehow blows up my installed VS2005. The build problems occur in VS2005 -- the environment my project was created in. I have not tried porting the code over to VS2008.

There are 2 reasons I'm blaming the VS2008 installer: (1.) my project built fine before I installed 2008, (2.) on my other machine, where I have NOT installed 2008, the project continues to build fine without the aid of a hotfix (as addressed in KB922271). This seems to rule out any coding or project configuration problems.

Mark Salsbery5-Nov-07 8:44

5-Nov-07 8:44

Ohhh, ok. Sorry for the confusion.

I'm not sure what's up with a side-by-side install of 2008 B2 with 2005.
I never installed the B2 version.

What does the readme say about installing with 2005?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

How to track Mouse Movement in a Property Page Dialog

savibosch4-Feb-10 22:31

savibosch

4-Feb-10 22:31

Hello,

I am using Visual studio 2008, but still i have the following error.
Warning 1 warning C4945: cannot import symbol from '.\X.dll': as 'X module' has already been imported from another assembly 'Y' .\Y.dll .
I am using C++ dll in the .NET project.
Please do the needful.

Thanks and Reagrds,
Savitha

Larry Mills Sr4-Nov-07 9:29

Larry Mills Sr

4-Nov-07 9:29

I need to be able to track a mouse's mmovement within a dialog that has several (10) EditBoxes. Since it would not be practical for the User to have to tab several EditBoxes to get to the one he/she wants to enter data into; the EditBoxes are not Tabed. I need to know where the User is (in what EditBox) so that the proper function call is active for the users input. This is actually a Wizard-style property page so there is no OK button to poll for; and the User is not required to use any of the EditBoxes on any given page. Hence the need to know when ther User has Started entering data in what EditBox.
Help with usable code examples would be appreciated. (Note: I am using VS 6.0 in MFC.)

A C++ programming language novice, but striving to learn

editbox --> MFC --> wrong forum

Luc Pattyn4-Nov-07 9:44

Luc Pattyn

4-Nov-07 9:44

Function return string pointer

karthickbabu_india2-Nov-07 18:06

karthickbabu_india

2-Nov-07 18:06

I am creating a function two string as input and return the concatenated of the string. How can i write these code. I tried but my program crashes

can any one reply for this Frown | :(

karthickbabu

Re: Function return string pointer

Mark Salsbery2-Nov-07 18:18

Re: Function return string pointer

2-Nov-07 18:18

String ^Str1 = "Concatenated";
String ^Str2 = "String";

String ^ConcatenatedStr = String::Concat(Str1, Str2);

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Christian Graus2-Nov-07 19:19

Christian Graus

2-Nov-07 19:19

I'm guessng you;re in the wrong forum. However, either way, if you tried something, post the code so we can correct it.

Christian Graus - Microsoft MVP - C++

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Looking for a VS 2008 tutor (by phone) - C++, C# and VB

EdBerde2-Nov-07 8:17

EdBerde

2-Nov-07 8:17

Anyone want to make $25-30/hr tutoring me via phone? I just installed Visual Studio 2008 Beta 2 and I am looking for someone to help me come up to speed on C++, C# and VB. I haven't touched Visual Studio since 6.0, so I am a bit out of date. Also, I'm entirely self-taught, so I would like someone who can show me how to start from scratch and set things up 'correctly'. My focus is on creating a simple C++ form app using CLR specifically for Vista. I need to know the correct method for reading/writing files, and I would like to learn how to use RegisterPowerSettingNotification to catch the WM_POWERBROADCAST message in C++, C# and VB. If you can control a serial port, that would be great too.

Currently I am creating an application to control my home projector, but this is really just to help me come up to speed again. This can be done in off-hours late nights and weekends and I can pay via paypal.

My email address is ima_computer@yahoo.com

Thanks!

- Ed

Re: Looking for a VS 2008 tutor (by phone) - C++, C# and VB

Paul Conrad7-Mar-08 17:30

Paul Conrad

7-Mar-08 17:30

Asking questions on this site is a good way to get some questions answered...

"I guess it's what separates the professionals from the drag and drop, girly wirly, namby pamby, wishy washy, can't code for crap types." - Pete O'Hanlon

Serial COM-Port project

strizi2-Nov-07 1:22

strizi

2-Nov-07 1:22

I have to use the serial COM-Port with managed C++, but I can not find any project.
On CodeProject I found the articel "How to open a serial COM port in Managed C++", but I allways get a exception.

So, please, has somebody a managed C++ project with COM?

Re: Serial COM-Port project

led mike2-Nov-07 4:51

Re: HOW TO get length of BYTE variable in C++

2-Nov-07 4:51

I have no experience with this subject, but if I need to solve your problem I would look for samples/examples in C#. It is simple enough to translate C# code samples of the BCL usage into C++/CLI.

led mike2-Nov-07 4:48

JPEG to Grayscale conversion [modified]

2-Nov-07 4:48

Ontanggabe Parulian wrote:
Is there anyone know how to get the length of the "ld_pbyteTemp" in function printLen?

Not intrinsically. What is your background? This is a C 101 topic. C arrays have no length data in their structure, period.

Also this is the wrong forum for a pure C/C++ question. See the message at the top of the forum "The C++ / CLI is for managed and mixed-mode C++ programming only", open it up and read it, it won't hurt you.

Rajish Sajayan1-Nov-07 21:35

Rajish Sajayan

1-Nov-07 21:35

Hi,

I have a BYTE pointer it contains the values that i have read from a jpeg file. how can i convert it in to a BYTE pointer of grayscale image.

Thanks in advance

Re: JPEG to Grayscale conversion

Christian Graus2-Nov-07 19:18

Christian Graus

2-Nov-07 19:18

Well, I assume you're askng in te wrong forum, but if you aren't, then the Bitmap class is how you convert a JPEG to an in memory image, and you can convert to greyscale with a color matrix. You can then save the resultant image as a stream, giving you a JPEG byte array again.

But, if you're n the wrong forum, you need to find another way to read a JPEG, convert it to grey scale and save it as a JPEG again.

how to use code using C++ for splash screen display

yolmo1-Nov-07 3:04

yolmo

1-Nov-07 3:04

using C++, please help to create display the first screen page for the project?

great things comes in small packages

Re: how to use code using C++ for splash screen display

Mark Salsbery1-Nov-07 11:21