Re: correctly play WM_MOUSEWHEEL - C / C++ / MFC Discussion Boards

Kyle Bishop wrote:
That seems strange that my school is teaching me outdated material (damn budget).

The problem is rarely the budget, it's that teachers are probably a bunch of old C hackers who actually don't know any better.

Kyle Bishop wrote:
Anyways, I'm still a little confused as to what I do to use cout or endl. Are there replacements, are they in std, etc.?

Yes, the standard headers contain the same stuff, they are just in std. So, to extend my example:

#include <iostream>

using std::cout;
using std::endl;

will give you what you're after.

As an aside, don't overuse endl, it does more than send a /r/n, it also flushes the stream, so if you use it in tight loops, performance will suffer.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Check out the VC forum FAQ:
2.1 I'm trying to use a standard C++ library class (like cout, cin, or string) but the compiler gives an undeclared identifier error (C2065) on those names. Why?[^]

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb
Magnae clunes mihi placent, nec possum de hac re mentiri.

Kyle,
I don't know if you are using VC++ 6.0 or .net. I also had a similar problem when porting VC++ 6.0 code to 2003 .net.
Some kind soul informed me that I should use "iostream" instead of
"iostream.h" and it worked!

Somehow, MicroSoft dropped the ".h" in later releases of the compiler in this case.

Good Luck.

thompsons wrote:
Somehow, MicroSoft dropped the ".h" in later releases of the compiler in this case.

This is not the case. In fact, when you are using iostream without .h and in angle brackets, you are using STL's iostream. Microsoft dropped support for streams when they first came up with Visual C++.NET

Found on Bash.org

I'm going to become rich and famous after i invent a device that allows you to stab people in the face over the internet
My Articles

I am using the VMRPLAYER sample program from DirectX SDK
as a template. I need to use the filename from file opened
as the main stream for the C language fopen command.

I need the full filename (ie: C:\subdirectory\video.vob) in the C program. Where to look and what strmcopy is best.

Thanks

I try to record and playback application session with help of WH_JOURNALRECORD and WH_JOURNALPLAYBACK hooks but can’t properly playback MOUSEWHEEL event ( rotation direction is ignored)

JournalRecordProc and JournalPlaybackProc hook procedures use LPARAM ( pointer to the EVENTMSG structure ) to get/pass message specific information during recording/playing.
This EVENTMSG structure has no member for WPARAM information, but key indicator and wheel rotation information are stored in WPARAM of WM_MOUSEWHEEL message. The same problem is with all messages with specific WPARAM info.

How I can correctly play WM_MOUSEWHEEL message?

Thanks in advance

Petr

I looked at the definition of the EVENTMSG structure according to http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookstructures/eventmsg.asp[^] is:

typedef struct {
    UINT message;
    UINT paramL;
    UINT paramH;
    DWORD time;
    HWND hwnd;
} EVENTMSG, *PEVENTMSG;

There is paramL in there. I'm assuming that's what you're looking for.

Greba,

My lack of content on my home page should be entertaining.

Thanks for reply

But I mean to playback with JournalPlaybackProc :

Syntax

LRESULT CALLBACK JournalPlaybackProc( int code,
WPARAM wParam,
LPARAM lParam
);
Parameters

code
[in] Specifies a code the hook procedure uses to determine how to process the message. If code is less than zero, the hook procedure must pass the message to the CallNextHookEx ..........

wParam
This parameter is not used !!!!!!!!!!!!!!!!!!!.

lParam
[in] Pointer to an EVENTMSG structure that represents a message being processed by the hook procedure.
-----------------------------------------------------------------------
The source of data to fill EVENTMSG structure is WM_MOUSEWHEEL message what returns

WPARAM wParam
LPARAM lParam;

Parameters

wParam
The high-order word indicates the distance the wheel is rotated, expressed in multiples or divisions of WHEEL_DELTA, which is 120. A positive value indicates that the wheel was rotated forward, away from the user; a negative value indicates that the wheel was rotated backward, toward the user.

The low-order word indicates whether various virtual keys are down. This parameter can be one or more of the following values.
MK_CONTROL
The CTRL key is down.
MK_LBUTTON
The left mouse button is down.
MK_MBUTTON
The middle mouse button is down.
MK_RBUTTON
The right mouse button is down.
MK_SHIFT
The SHIFT key is down.
MK_XBUTTON1
Windows 2000/XP: The first X button is down.
MK_XBUTTON2
Windows 2000/XP: The second X button is down.

lParam
The low-order word specifies the x-coordinate of the pointer, relative to the upper-left corner of the screen.

The high-order word specifies the y-coordinate of the pointer, relative to the upper-left corner of the screen.
----------------------------------------------------------------------------
As it turns out there is no place in EVENTMSG for data stored in WM_MOUSEWHEEL message wParam.

typedef struct
{
UINT message;
UINT paramL; // place for x-coordinate
UINT paramH; // place for y-coordinate
DWORD time;
HWND hwnd;} EVENTMSG, *PEVENTMSG;

Petr P. wrote:
UINT paramL; // place for x-coordinate
UINT paramH; // place for y-coordinate

I don't know if what you stated above is correct. Under my system I follow this logic:
WPARAM is defined as UINT_PTR which in turn is defined as unsigned int
LPARAM is defined as LONG_PTR which in turn is defined as long
UINT is defined as unsigned int

And also under my system sizeof(long) == sizeof(unsigned int). This means that you have enough space in the EVENTMSG structure being passed in to store everything. I doubt there would be any conversion nessisary.

I think all you would have to do is store your WPARAM and LPARAM in paramL and paramH.

Greba,

My lack of content on my home page should be entertaining.

Interesting idea.

I have tried to put contents of wParam words to high-order words of EVENTMSG ParamL/ParamH .

Regrettably it does not work. System works with X/Y coordinates only .
So problem pending.

BR
Petr

Problem is solved. I don't find better way, than to mix WH_JOURNALRECORD hooks with interseption of WM_MOUSEWHEEL and sinchronising this messages on play.

Hello

I want becom the handle of the desktopbackround so that i can set a playet movie behind the icon´s of the desktop.

thank you for help and sorry for my bad english.

Regards Nico

HWND GetDesktopWindow();

I now this and this is the handle for the desktop but if i draw in this window and display it i don´t can see the icons on the desktop. I want that the video plays in the backround so that the user can see all of the icon´s on the desktop normal.

I see.
Apologies for having insulted your knowledge there.
Blush | :O

My ATL service crashes when it is being stopped by the system (its startup mode is "automatic"). This happens only if the service is running on Windows XP and is being stopped automatically (not manually).

The source code:

HRESULT CMyServiceModule::PostMessageLoop()
{
RevokeClassObjects();
LogEvent(_T("Service stopped"));
CoUninitialize();

SetServiceStatus(SERVICE_STOPPED); // <--- this line causes the crash

return CAtlServiceModuleT<clegnlicenceservicemodule, ids_servicename="">::PostMessageLoop();
}

The debugger shows that m_hServiceStatus is NULL.

Thank you in advance for any ideas.

I am having a problems printing the output for this program. With C++ when I compile and run the program I am left with an exe file. How do I incorporate code to print out the output? Below is the code. Where do I enter it within the program? Basically I want to be able to print the output.

//#include

int main()
//(int,char*)
//{
//ofstream printer ("1pt1:");
//Printer <<"test"<<endl;
//return o;
//}

{
int c;
double fee;
double total;
char a ='y', ans;
string input;
int number;

while (a =='y'|| a =='Y')
{

cout << "\nChoose from options below.\n";
cout << "\nEnter A to calculate total RWA cost.\n";
cout << "\nEnter B to calculate RWA base estimate.\n";
cout << "\nEnter your choice, then press the enter key:\a";
cin >> ans;
cin.ignore();

if (ans == 'A' || ans == 'a' ){

cout << "\nEnter RWA Base Estimate, then press the enter key:$\a";
cin >> input;
cout << "You entered:$" << input << endl;
int pos = input.find(',');
while (pos != -1)
{
input.replace(pos, 1, "");
pos = input.find(',');
}
number = atoi(input.c_str());
fee = number * 0.04;
cout << fixed;
cout.precision(2);
cout << "4% Management Fee:$" << fee <<"\n";
total = number + fee;
cout << fixed;
cout.precision(2);
cout << "Total:$" << total <<"\n";

if (total >= 1 && total <= 2499)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.1 <<"\n";
cout << "Total Obligation:$" << total + (total * 0.1) <<"\n";
}
if (total >= 2500 && total <= 9999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.09 <<"\n";
cout << "Total Obligation:$" << total + (total * 0.09) <<"\n";
}
if (total >= 10000 && total <= 24999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.08 <<"\n";
cout << "Total Obligation:$" << total + (total * 0.08) <<"\n";
}
if (total >= 25000 && total <= 49999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.07 <<"\n";
cout << "Total Obligation:$" << total + (total * 0.07) <<"\n";
}
if (total >= 50000 && total <= 99999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.05 <<"\n";
cout << "Total Obligation:$" << total + (total * 0.05) <<"\n";
}
if (total >= 100000 && total <= 299999)
{

cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.03 <<"\n";
cout << "Total Obligation:$" << total + (total * 0.03) <<"\n";
}
if (total >= 300000 && total <= 999999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.015 <<"\n";
cout << "Total Obligation:$" << total + (total * 0.015) <<"\n";
}
if (total >= 1000000 && total <= 2425000)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.005 <<"\n";
cout << "Total Obligation:$" << total + (total * 0.005) <<"\n";
}

}

if (ans == 'B' || ans == 'b') {

cout << "\nEnter Total RWA Cost, then press the enter key:$\a";
cin >> input;
cout << "You entered:$" << input << endl;

int pos = input.find(',');
while (pos != -1)
{
input.replace(pos, 1, "");
pos = input.find(',');
}
number = atoi(input.c_str());
fee = number * 0.04;
cout << fixed;
cout.precision(2);
cout << "4% Management Fee:$" << fee <<"\n";
total = number - fee;
cout << fixed;
cout.precision(2);
cout << "Total:$" << total <<"\n";

if (total >= 1 && total <= 2499)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.1 <<"\n";
cout << "Spendable Amount:$" << total - (total * 0.1) <<"\n";
}
if (total >= 2500 && total <= 9999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.09 <<"\n";
cout << "Spendable Amount:$" << total - (total * 0.09) <<"\n";
}
if (total >= 10000 && total <= 24999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.08 <<"\n";
cout << "Spendable Amount:$" << total - (total * 0.08) <<"\n";
}
if (total >= 25000 && total <= 49999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.07 <<"\n";
cout << "Spendable Amount:$" << total - (total * 0.07) <<"\n";
}
if (total >= 50000 && total <= 99999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.05 <<"\n";
cout << "Spendable Amount:$" << total - (total * 0.05) <<"\n";
}
if (total >= 100000 && total <= 299999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.03 <<"\n";
cout << "Spendable Amount:$" << total - (total * 0.03) <<"\n";
}
if (total >= 300000 && total <= 999999)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.015 <<"\n";
cout << "Spendable Amount:$" << total - (total * 0.015) <<"\n";
}
if (total >= 1000000 && total <= 2425000)
{
cout << fixed;
cout.precision(2);
cout << "Overhead:$" << total*0.005 <<"\n";
cout << "Spendable Amount:$" << total - (total * 0.005) <<"\n";
}

}

cout <<"********************************************************************""\n";
cout <<"* Rate Range Subtotal Max. Range *""\n";
cout <<"* .01 .1 $2,499 $250.00 $250.00 *""\n";
cout <<"* 0.09 $2,500 $9,999 $675.00 $675.00 *""\n";
cout <<"* 0.08 $10,000 $24,999 $800.00 $1,200.00 *""\n";
cout <<"* 0.07 $25,000 $49,999 $1,750.00 *""\n";
cout <<"* 0.05 $50,000 $99,999 $2,500.00 *""\n";
cout <<"* 0.03 $100,000 299,999 $6,000.00 *""\n";
cout <<"* 0.015 $300,000 $999,999 $10,500.00 *""\n";
cout <<"* 0.005 $1,000,000 $2,425,000 $7,125.00 *""\n";
cout <<"********************************************************************""\n";

cout<<"Would You Like to Perform Another Calculation (Y/N)?\a";
cin>> a;

}

cout <<"\nGoodBye\n";
getchar();
return 0;
cin >> c;

}

Old Program Below

// RWA's and Charges

#include <iostream>
using std::cout;
using std::cin;
using namespace std;

//using::endl;

int main()
{
int choice, c;
float amount,total,overhead;

cout << "\nChoose from options below.\n";
cout << "\nEnter 1 to calculate total RWA cost.\n";
cout << "\nEnter 2 to calculate RWA base estimate.\n";
cout << "\n\t\tEnter your choice, then press the enter key:";
cin >> choice;

if (choice == 1){

cout << "\nEnter RWA Base Estimate, then press the enter key:$";
cin >> amount;
overhead = amount * 0.04;
cout << "Total Overhead is:$" << overhead <<".\n";
total = amount + overhead;
cout << "Total:$" << total <<".\n";

if (total >= 1 && total <= 2499)
{
cout << "Cost is:$" << total + (total * 0.1) <<".\n";
}
if (total >= 2500 && total <= 9999)
{
cout << "Cost is:$" << total + (total * 0.09) <<".\n";
}
if (total >= 10000 && total <= 24999)
{
cout << "Cost is:$" << total + (total * 0.08) <<".\n";
}
if (total >= 25000 && total <= 49999)
{
cout << "Cost is:$" << total + (total * 0.07) <<".\n";
}
if (total >= 50000 && total <= 99999)
{
cout << "Cost is:$" << total + (total * 0.05) <<".\n";
}
if (total >= 100000 && total <= 299999)
{
cout << "Cost is:$" << total + (total * 0.03) <<".\n";
}
if (total >= 300000 && total <= 999999)
{
cout << "Cost is:$" << total + (total * 0.015) <<".\n";
}
if (total >= 1000000 && total <= 2425000)
{
cout << "Cost is:$" << total + (total * 0.005) <<".\n";
}

}

if (choice == 2) {

cout << "\nEnter Total RWA Cost, then press the enter key:$";
cin >> amount;
overhead = amount * 0.04;
cout << "Total Overhead is:$" << overhead <<".\n";
total = amount - overhead;
cout << "Total:$" << total <<".\n";

if (total >= 1 && total <= 2499)
{
cout << "Cost is:$" << total - (total * 0.1) <<".\n";
}
if (total >= 2500 && total <= 9999)
{
cout << "Cost is:$" << total - (total * 0.09) <<".\n";
}
if (total >= 10000 && total <= 24999)
{
cout << "Cost is:$" << total - (total * 0.08) <<".\n";
}
if (total >= 25000 && total <= 49999)
{
cout << "Cost is:$" << total - (total * 0.07) <<".\n";
}
if (total >= 50000 && total <= 99999)
{
cout << "Cost is:$" << total - (total * 0.05) <<".\n";
}
if (total >= 100000 && total <= 299999)
{
cout << "Cost is:$" << total - (total * 0.03) <<".\n";
}
if (total >= 300000 && total <= 999999)
{
cout << "Cost is:$" << total - (total * 0.015) <<".\n";
}
if (total >= 1000000 && total <= 2425000)
{
cout << "Cost is:$" << total - (total * 0.005) <<".\n";
}

}

//return 0;
cin >> c;

}

Hi
What happens if you run this code;

ofstream printer("lpt1:");
printer << "test" << endl;

If that prints something on your printer, you're in business and can simply change all instances of 'cout' to 'printer', with above lines added at beginning of the main function.

HTH
Martin

Thanks Martin,
I will try your recommendation and see what happens. I did not know you had to change all couts to printer. I am a beginner and have been working with this for awhile. I have had many recommendations and probably due to my inexperience I was not able to figure out what was going on.

From a command prompt, redirect the output of your program to the printer by typing:

program > prn

BTW, for future posts, there is no need to post all of your code, only the relevant parts. Asking folks to wade through a bunch of code is a sure-fire recipe for getting little to no help.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Does anybody know of an API for Digital Cameras?
Confused | :confused:

I am the handsome one in the crowd.

Well, there's the Still Image API[^].

Does that help?

Stability. What an interesting concept. -- Chris Maunder

hai all,
when i connect a Oracle with vc, after closing the application window i am getting "User Break point at &72ff234" an error in a messagebox , and it automatically opens an assembly program and arrow points to the 72ff234 line.
i am getting this only while closing the application after using the database connection. i tested the program , with out connecting to database, i close the app. windows.. i didnt get the error ...
how clear it...
thanks in advance...
Surya Prakash Blush | :O

It sound like you have forgotten to disconnect from the database and clean up the appropriate database handles before exiting your application.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Previously (ie. VC++ 6), the Profiler was only included in the Professional and Enterprise versions. Is the Profiler included in VC++ 2003 Standard or do you have to purchase Visual Studio Pro 2003 (since it's not possible to purchase VC++ 2003 Professional separately) ?