C / C++ / MFC Discussion Boards

Shog⁹2-Feb-02 15:11

2-Feb-02 15:11

Ask yourself, what do you hope to accomplish? If you are collaborating with others on a project, what you use will be restricted by what the others you work with can and do use. If you are working solo, you will have many more options. MFC is useful, in that it provides a (somewhat) consistant framework, and Visual Studio provides many wizards to help you... but this is most useful when the application you are writing falls into one of the categories Microsoft wrote MFC to be used for. If you need to throw something together in a hurry, C++ Builder, or even VB can be a better choice.

It does get easier, and somewhat faster. I've been using MFC for almost two years now, with no prior Windows programming experience, and still learning constantly. In hindsite, MFC would have been a lot easier to learn if i had been comfortable with the Win32 API prior to learning it; however, if i had been comfortable with the Win32 API, i prolly wouldn't have bothered. One of MFC's biggest advantages is that it often hides the ugly and inconsistent API; but this is also its biggest problem. Some of the hacks used to mask the differences between Windows and MFC are not exactly clear to beginners. The rest of MFC: database stuff, serialization, debugging, etc... can usually be done without. If you already use STL, you won't need to use the CMap, CArray, etc. classes for instance.

Wow, this is getting long... sorry Blush | :O . I guess my best advice would be, make sure you really need to use MFC before you jump in and start learning it. If you don't learn it now, but need to use it at some point in the future, it won't be hard to pick up. Just treat it like a geriatric family member: full of information, but much of it out-dated, incorrect, or forgotten. Respect it, but beware of senility. Roll eyes | :rolleyes:

farewell goodnight last one out turn out the lights

Smashing Pumpkins, Tales of a Scorched Earth

Re: MFC is Challenging :: C++

Paul M Watt2-Feb-02 15:21

Paul M Watt

2-Feb-02 15:21

Have you thought of learning WTL. It is fairly simple, very light-weight, and there are wrapper classes for just about every control in WIN32.

While it is not supported by Microsoft, it is free, and there is a very large development community that does support it.

Re: MFC is Challenging :: C++

valikac3-Feb-02 6:40

valikac

3-Feb-02 6:40

Thanks for the inspirational comments.

I will definitely stick with MFC. I find it challenging, but one can easily master MFC with a lot of intensive reading, GUI design and MFC implementation. I will approach it that way.

I like MFC because it is from Microsoft. If I am going to design programming for Microsoft windows using C++, I might as well master a tool that is designed by the developers behind the OS for the OS.

Kuphryn

Re: MFC is Challenging :: C++

valikac4-Feb-02 4:45

valikac

4-Feb-02 4:45

Thanks everyone.

I hear two sides including MFC is bloated and MFC is powerful once the developer learns its working. Both sounds valid.

One thing I see is MFC developers like MFC, while developers that user other GUI tools and/or are in the process of learning MFC seem criticize it. Both situations are understandable.

As I this topic reads, I find MFC challenging mainly because there are many specific "tweaks," which are difficult for a beginner to learn, design around, and implement.

As I said before, I will definitely go through this process and learn MFC. I will give all I got into Prosise book. My goal is to first finish reading the book. My goal is to gain as much insight as I possibly can throughout the process. It will take some time, but very doable.

Are there some tips you have for gaining the most insights as possible during the process of learning MFC? I learning C++ quick. I can certainly apply the same technique I used throughout the process of learning C++.

Thanks,
Kuphryn

Create a SQL Query by CDaoDatabase::Execute ???

Hadi Rezaee2-Feb-02 5:46

Hadi Rezaee

2-Feb-02 5:46

Hi all,

How can i create a SQL Query in Access Database (.mdb), by CDaoDatabase::Execute ????

Help me Frown | :(

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Create a SQL Query by CDaoDatabase::Execute ???

Philip Patrick2-Feb-02 13:54

Philip Patrick

2-Feb-02 13:54

Using CREATE PROCEDURE SQL command I guess. Look for description on it in your MS Access help

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Re: Create a SQL Query by CDaoDatabase::Execute ???

Hadi Rezaee2-Feb-02 20:51

Hadi Rezaee

2-Feb-02 20:51

Hi again,
Thank you for introducing CREATE PROCEDURE statment to me ...
I read MS-ACCESS help, too.
But i have problem in using of this statment,

I wanna tell you my problem:

I have OPERATION table with below fields:
PID1(long) - PID2(long) - OP(boolean)

I wanna query in access database with below query:

SELECT PID1, OP, PID2 FROM OPERATION
UNION ALL
SELECT PID2, NOT OP, PID1 FROM OPERATION

I wrote below code but doesn't work:

MyDB.Execute( "CREATE PROCEDURE TempQuery [NUMBER1] LONG, [OP] LOGICAL, [NUMBER2] LONG AS SELECT PID1, OP, PID2 FROM OPERATION UNION ALL SELECT PID2, NOT OP, PID1 FROM OPERATION" );

I wrote it too but doesn't work:

MyDB.Execute( "CREATE PROCEDURE TempQuery AS SELECT PID1, OP, PID2 FROM OPERATION UNION ALL SELECT PID2, NOT OP, PID1 FROM OPERATION" );

What is my wrong ??? Frown | :(

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Create a SQL Query by CDaoDatabase::Execute ???

Philip Patrick2-Feb-02 23:14

Philip Patrick

2-Feb-02 23:14

Bah... did you tried to run your query in Access? Not in code? I just tried and see that Access don't know what is that CREATE PROCEDURE, it want to get only CREATE TABLE statements Frown | :(

I used Access 2000 for test

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Re: Create a SQL Query by CDaoDatabase::Execute ???

Hadi Rezaee3-Feb-02 0:22

Hadi Rezaee

3-Feb-02 0:22

Thanks for your helps ! Smile | :)

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Concatenating: characters->string->vector (string) :: C++

valikac2-Feb-02 5:42

valikac

2-Feb-02 5:42

Hi.

I would like to know how to concatenate characters into a string that is an element of a vector.

For example:

string dataTemp("today");
std::vector<string> vecTemp;

vecTemp.push_back(dataTemp);

// I want to add characters into the tring element of vecTemp

vecTemp[0] += " is Saturday." // Is that right?

I would like vecTemp[0] to be "today is Saturday."

Thanks,
Kuphryn

Copying *Specific* Elements From VectorA to VectorB :: C++

valikac2-Feb-02 5:34

valikac

2-Feb-02 5:34

Hi.

Let say there are two vectors, vectorA and vectorB.

-----------------------------------------------------
string dataTemp;
std::vector<string> vectorA, vectorB;

for (int = 0; i < 10; ++i)
{
dataTemp += i;
vectorA.push_back(dataTemp);
}

/* The loop above should produce vectorA to look something like this:
0
1
12
123
1234
12345
123456
1234566
12345678
123456789
*/

Okay, vectorB is empty.

I want to copy *specific* elements from vectorA to vectorB.

For example:

vectorB.push_back(vectorA[4]); // Is that right?
vecotrB.push_back(vectorA[8]);

Thanks,
Kuphryn

checking first char of a string??

2-Feb-02 5:11

I need to Check the first char of a string
to see if it is A, B, or C
are there any methods
to do that?
thank you
Confused | :confused:

Re: checking first char of a string??

valikac2-Feb-02 5:37

valikac

2-Feb-02 5:37

Let say you have this:

string temp("February");

if (toupper(&temp[0]) == "A")
...

Try that first because I have not tested it.

Kuphryn

Re: checking first char of a string??

Jay Beckert2-Feb-02 6:48

Jay Beckert

2-Feb-02 6:48

You can try the GetAt() function:

CString str;

char ch = str.GetAt(0);
switch (ch)
{
case 'A':
{
//do something based on char A
return result;
}break;
case 'B':
{
//do something based on char B
return result;
}break;
case 'C':
{
//do something based on char C
return result;
}break;
}

Hope that helps, if not let us know.

Cheers
Jay Beckert

C2653

2-Feb-02 4:21

C:\My Documents\DataStru\Investors.cpp(7) : error C2653: 'Investors' : is not a class or namespace name
can anyone tell me why does it give this error? PLEASE
i have "investors.h" included in investors.cpp but it's still giving me this error
thank you

GOT IT FIXED

2-Feb-02 4:25

thanks to all of you

Displaying drop down ComboBox

athick2-Feb-02 3:40

athick

2-Feb-02 3:40

hi
I have loaded a CComboBox object m_combo with the list of drives using DirDlgListComboBox.I also used SetCurSel(0) to display the first element
in the loaded list.Now i want to display all the loaded data when somebody clicks on the dropdown arrow.So i added an event CBN_DROPDOWN .In the handler i added this line of code

m_combo.ShowDropDown();

This gives an unhandled exception.I have just started MFC programming .So if anybody can tell me why this happens and also suggest me to make it work correctly.

Re: Displaying drop down ComboBox

Shog⁹2-Feb-02 15:19

Shog⁹

2-Feb-02 15:19

Combo boxes will dropdown when you click on the arrow by default. You don't need any extra code to make this work.

farewell goodnight last one out turn out the lights

Smashing Pumpkins, Tales of a Scorched Earth

Re: Displaying drop down ComboBox

athick2-Feb-02 19:42

athick

2-Feb-02 19:42

CString *temp1 = new CString("");
LPTSTR str1 = temp1->GetBuffer(temp1->GetLength());
int ret=this->DlgDirListComboBox(str1,IDC_DIRCOMBO,0,DDL_DRIVES);
if(ret==0)
{
DWORD i=::GetLastError();
}
int n=m_list1.GetCount();
//m_combo.SetCurSel(1); //default data is not displayed in comboBox is this is not done.
ret=m_combo.GetLBTextLen(1);
m_combo.GetLBText(1,m_list);
m_list.Delete(0,2);
m_list.Delete(1,2);
ret = m_list.GetLength();
m_list+=":\\";
str1 = m_list.GetBuffer(m_list.GetLength());
ret=this->DlgDirList(str1,IDC_LIST1,0,DDL_EXCLUSIVE|DDL_DIRECTORY);
if(ret==0)
{
DWORD i=::GetLastError();
}
//LPCTSTR t = m_list;
//m_list1.AddString(t);
m_list1.SetCurSel(0);
n=m_list1.GetCount();
Invalidate();
m_list.ReleaseBuffer();
temp1->ReleaseBuffer();
delete temp1;

this is how i generate data in ComboBox

For the ComboBox the properties are Style 1.type = "dropdown" 2.Owner draw = " no".......the dropdown list doesnot display

can u help Confused | :confused:

VC 6.0 in WinXP?

Joel Holdsworth2-Feb-02 3:44

Joel Holdsworth

2-Feb-02 3:44

I've just udated my computer to use winxp, but I'm finding that I can't visual c++ debug to work properly with it. I used the NT upgrade util, but it says that the header wont work with xp. So, when I debug it gives error messages. This problem can't be that uncommon - does anyone know the answer? Do I need a service pack somthing?

With time we live, with money we spend!
Joel Holdsworth

Re: VC 6.0 in WinXP?

Michael P Butler2-Feb-02 4:05

Michael P Butler

2-Feb-02 4:05

I'm running VC6 SP 5 on Windows XP and debugging without a problem. What error messages are you being shown?

Michael Smile | :)

Ah SP5

Joel Holdsworth2-Feb-02 4:20

Joel Holdsworth

2-Feb-02 4:20

The SP5 bit might make a difference

thanks

With time we live, with money we spend!
Joel Holdsworth

Passing CArray to function

User 267402-Feb-02 2:57

User 26740

2-Feb-02 2:57

hi all,
I want to pass CArray parameter to a member function.
How can i define function and how to call that...
I'm getting error "error C2955: 'CArray' : use of class template requires template argument list" on the defination line of this function
This is my defination
MyClass::MyFuynction(CArray& myArray) {
...
}

Thanks for taking time to write in.
--Sumit

modified 1-Aug-19 21:02pm.

Re: Passing CArray to function

Joel Holdsworth2-Feb-02 3:48

Joel Holdsworth

2-Feb-02 3:48

I think, you need to pass MyFunction(CArray<cfoo, cfoo=""> &myarray), where CFoo is the name of the classes which the array is made of. The error message is a complaint about the fact that you havn't specified what type of array. It could be an arry of anything for all the compiler knows, and you can't just have a generic CArray - you need to specify what the array is an array of...

With time we live, with money we spend!
Joel Holdsworth

MSN Messenger style alert windows

tinsleyphone1-Feb-02 23:32

tinsleyphone

1-Feb-02 23:32

I am interested in including alert windows for an application I am writing that are similar to those that gator and msn messenger pop up (the little boxes in the bottom right of the screen). I have done some searching around on the site, I havn't found anything that does what I am looking for. It very well could be that I just don't know what to look for as I don't know what you would call that little window. If anybody could point me in the right direction I would greatly appreciate it!
Thanks,
Paul

--
Paul Tinsley
<paul@ecymtech.com>

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