Re: Anyway to know the prototype of functions exported by a DLL - C / C++ / MFC Discussion Boards

Anonymous27-Apr-05 2:50

27-Apr-05 2:50

Im confused about how to create a C++ constructor that uses the current time from the time() function that will declare in the C++ standard library header to initialize the object of the Time class. Im a newbie at this can you guys give me a few pointers

Re: create C++ construct

David Crow27-Apr-05 4:29

David Crow

27-Apr-05 4:29

Something like:

class MyTimeClass
{
public:
    MyTimeClass()
    {
        time(&t);
    }

private:
    time_t t;
};

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: create C++ construct

br0wnssugr28-Apr-05 7:50

br0wnssugr

28-Apr-05 7:50

Thanks Dave, this really helps me. Im a beginner, and my program kept coming up with errors

Anyway to know the prototype of functions exported by a DLL

stolid_rock27-Apr-05 2:21

stolid_rock

27-Apr-05 2:21

Hi i have tried utilities like Dumpbin, OLEview, DEPENDS but we only get the function names. Is there any way to know the prototype of a function exported by a DLL.

Re: Anyway to know the prototype of functions exported by a DLL

Prakash Nadar27-Apr-05 2:43

Prakash Nadar

27-Apr-05 2:43

I dont think that is possible so let the idea of using undocumented api go.

-prakash

Re: Anyway to know the prototype of functions exported by a DLL

basementman27-Apr-05 10:34

basementman

27-Apr-05 10:34

There are really only two ways. One is to have the .h file with the prototypes defined, and the other is to guess (trial/error/reboot).

onwards and upwards...

Re: Anyway to know the prototype of functions exported by a DLL

stolid_rock27-Apr-05 18:01

stolid_rock

27-Apr-05 18:01

Thanks Anyway...
I thought someone may have some idea of making it possible.

Re: Anyway to know the prototype of functions exported by a DLL

Bob Stanneveld27-Apr-05 20:29

Bob Stanneveld

27-Apr-05 20:29

If you are good at reverse engineering, you can try to find a call to that function. Than look at the sthings that are pushed onto the stack. That should give you an idea about how many variables are used by the api. There is one catch though, you don't know what the variables types are, nor do you know what they are used for.

I don't know why you need to do that, but if you're planning to use undocumented api's, I can only say that you should not! They are not documented for a reason. The could be subject to change, or complete removal, so in the long run, it will break your program.

I also got the blogging virus..[^]

compiled file size

Stirfie27-Apr-05 1:46

Stirfie

27-Apr-05 1:46

I have a script that I have compiled on two different computers. On one the file size is 500kB, and on the other 1.23MB. Both were compiled with DEV C++. They both seem quite large given the script. Can anybody explain this. I should explain I am a beginner. The script is:-

#include <iostream>
#include <windows.h>
using namespace std;

int GetDir(char* dPath) {

WIN32_FIND_DATA FileData;
HANDLE hFile;
hFile = FindFirstFile(dPath,&FileData);

if ( INVALID_HANDLE_VALUE == hFile ) {
cout << "No files" << endl;
return false;
}

for ( ;; ) {
cout << FileData.cFileName << endl;
if ( 0 == FindNextFile(hFile, &FileData ) )
break;
}
return true;
}

int main() {
GetDir("*.jpg");

system("PAUSE");
return true;
}

Regards
Paul

Re: compiled file size

toxcct27-Apr-05 1:54

toxcct

27-Apr-05 1:54

don't you compile one in release mode and the other in debug mode ?

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Making App Windows Larger Than Desktop?

Anonymous27-Apr-05 1:42

Anonymous

27-Apr-05 1:42

Is it possible to make an application window that is larger than the desktop? Does Windows allow this? Or must I use the GDI to do this? Wouldn't the GDI just make an image of the app window without the true functionality inside? Thanks.

Re: Making App Windows Larger Than Desktop?

ThatsAlok27-Apr-05 2:19

ThatsAlok

27-Apr-05 2:19

Anonymous wrote:
Does Windows allow this?

Yes!

look for [MoveWindow] api!

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

cheers,
Alok Gupta

Re: Making App Windows Larger Than Desktop?

Anonymous27-Apr-05 3:38

Anonymous

27-Apr-05 3:38

I tried that.

I use the getcursor position func and to get the handle of an app window above my mouse cursor. For testing I used the calculator app. I called the api to increase the size. Strangely the width increased, but not the height. The width never increased greater than the width of the actual desktop. I call MoveWindow(mywindow, 0, 0, (width * 100), (height * 100), TRUE). I've tried setting the x,y position to be the center of the screen. It will draw the app window; half on screen half off screen. However, the total window size is never greater than the desktop size.

Sorry if this is a repost

Re: Making App Windows Larger Than Desktop?

David Crow27-Apr-05 7:17

David Crow

27-Apr-05 7:17

Anonymous wrote:
Is it possible to make an application window that is larger than the desktop?

Why?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Adding controls to the task bar??

Anonymous27-Apr-05 1:38

Anonymous

27-Apr-05 1:38

Is there a way to add controls to the Windows taskbar. I can create icons. I've tried app bars, but they take up too much space (I only need like 3 buttons) because I end up creating in essence a 2nd task bar on the screen (Window's task bar on the bottom and my app bar on the right side). How about making separate icons for each "button"? That's the only other solution that I can think of.

How do i disable mouse wheel in comboBox (MFC)

Yanshof27-Apr-05 1:35

Yanshof

27-Apr-05 1:35

i trying to disable mouse wheel in comboBox , i try to find this option in propertise but i dont find this option .
In comboBOx control i also can`t find this option.

Someone can Help me ??
How can i do it ?? Confused | :confused:

Binary value of a pixel from a bitmap

VPNampoothiri27-Apr-05 1:20

VPNampoothiri

27-Apr-05 1:20

In my VC++ application i have a bitmap of the class CBitmap. How i can get the binary value of a pixel from that bitmap. Whether it is possible to get the value using BITMAP structure or by using CImgeList.

Re: Binary value of a pixel from a bitmap

C^hris L^osinger27-Apr-05 1:29

C^hris L^osinger

27-Apr-05 1:29

if you need quick access to all pixels, you'll need to use GetDIBits . that will give you a DIB, which is a BITMAPINFOHEADER struct followed by the pixel data - vertically flipped, probably stored in BGR order (maybe BGRA depending on your video driver), with pixel rows padded to multiples of four bytes.

Image Toolkits | Image Processing | Cleek

Re: Binary value of a pixel from a bitmap

ThatsAlok27-Apr-05 2:16

ThatsAlok

27-Apr-05 2:16

Look for [GetDIBits] api!

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

cheers,
Alok Gupta

Re: Binary value of a pixel from a bitmap

Roger Allen27-Apr-05 5:51

Roger Allen

27-Apr-05 5:51

ANother way would be to select the bitmap into a DC and use GetPixel()

If you vote me down, my score will only get lower

Re: Binary value of a pixel from a bitmap

ThatsAlok27-Apr-05 23:26

ThatsAlok

27-Apr-05 23:26

Roger Allen wrote:
DC and use GetPixel()

How?? I believe we first have to paint the Bitmap into Window then we can use GetPixel() method!

is there is any direct method to do so!if yes please tell!

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

cheers,
Alok Gupta

Re: Binary value of a pixel from a bitmap

Roger Allen28-Apr-05 2:48

Roger Allen

28-Apr-05 2:48

A bitmap only needs to be selected into a DC for you to access it. Here is some example code extracted from my OD menu class:

COLORREF backgroundColour = 0;
{
    CDC dcCopy;
    dcCopy.CreateCompatibleDC(NULL);
    dcCopy.SaveDC();
    dcCopy.SelectObject(&toolbarBitmap);
    backgroundColour = dcCopy.GetPixel(0, 0);               // toolbars use pixel 0,0 of image 0 as the background colour
    dcCopy.RestoreDC(-1);
    dcCopy.DeleteDC();
}

If you vote me down, my score will only get lower

Re: Binary value of a pixel from a bitmap

ThatsAlok28-Apr-05 2:55

ThatsAlok

28-Apr-05 2:55

thanks i am looking for it quite long time!

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

cheers,
Alok Gupta

WIndows XP

densitet27-Apr-05 0:44

densitet

27-Apr-05 0:44

Hello everybody, i have a simple questions i think, but i don't know the answers:
Before all, i have to say that i have create a andministrator and an limited user account.
But my questions are:

1) If we add a shortcut to the Start Menu | Programs | Start Up of our application but in the administrator account. It will starts to work if for example we log in in the WXP with the limited account. And if it starts to run, we can prohibite to the limitate account to don't stop the application?

2) If we add a entry in the registry to start our application, how we can stop to the user to don't delete this entry in the registry?

Thank u for the possible help.

Why OpenDocument Failed

zahid_ash27-Apr-05 0:15

zahid_ash

27-Apr-05 0:15

Hi,

My SDI program was opening all saved files , that was saved by it ( in its Extension).

Error Message displayed by program is "Unexpected file format"

I made a Change in Serialize variables ( i added one more)
Now the Program is not opeing old Saved Files.
But it can open Newly made and saved files after changing.

Any suggestion?

Regards.

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