Visual C++ :: Reading COM Struct From IDispatch
Apr 1, 2014
My question is that I have C++ function which has a IDispatch input as argument.
I am trying to read the struct from IDispatch.
So basically, the struct definition is
struct MyStruct {
void *m_pValue;
};
I can get the ITypeInfo and read the whole structure definition from it. But I do not know how to read the struct instance value. I am dumping all the info from ITypeInfo
TYPEATTR
========
guid {A1CB710C-8D50-3181-BB38-65CE2E98F9A6} _GUID
lcid 0x00000000 unsigned long
dwReserved 0x00000000 unsigned long
memidConstructor 0xffffffff long
memidDestructor 0xffffffff long
[Code] ....
View 6 Replies
ADVERTISEMENT
Nov 20, 2014
Code:
#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
struct inventory
[Code]...
This is my program output Enter the file name : "filename".txt ..... (Nothing shows up)
View 3 Replies
View Related
Sep 28, 2013
I have a file in which I have written a structure called "Record".
Here is the struct definition:
#define IDSIZE 10
struct Record{
char id[IDSIZE];
int score;
};
[Code]....
View 1 Replies
View Related
Nov 21, 2014
#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
struct inventory {
int barcode;
char description[512];
[Code] ....
This is my text file
20123451
Sugar packet (1 kg)
2.50
560
21347652
Milo 3-in-1
12.50
200
20123453
Salt (1kg)
4.50
270
21347654
Nescafe 3-in-1
12.50
400
20123455
Tamatoes
4.00
100
21347656
Cucumbers
4.00
280
This is my program output
Enter the file name : "filename".txt
..... (Nothing shows up)
View 1 Replies
View Related
Mar 19, 2012
Basically I want to read data from text-file into two variables in a struct.
The text file is formated in the following way:
var1 [TAB] var2
The problem occurs when var2 is longer than one word and it doesn't really read the data into the struct. Here's the textfile.
DVD Kidmovie 1
Blu-Ray Spam Kings 2000
VHS The Short Road
Here's my program.
#include "stdafx.h"
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
using namespace std;
struct movieData{
[Code] ....
View 1 Replies
View Related
May 20, 2013
Below is the code for reading a struct that was stored in a binary file. Problem is while reading from file I get the name without first character and age is always equal to zero which it should not be.
#include <iostream>
#include <conio.h>
#include <fstream>
struct abc {
char name[100];
int age;
[Code] .....
View 3 Replies
View Related
May 3, 2013
I am reading from a file and saving in a struct table but they just saved as NULL
I erased the files stuff because they were working and taking a lot of space
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define WL 30
#define L1 150
#define L2 5000
#define L3 40
[Code] .....
View 3 Replies
View Related
May 4, 2013
I'm trying to read in lines for a file and storing it in an array. This is what I have so far. Am I allocating the memory correctly?
Code:
typedef struct {
/* declartion of variables */
} App
typedef struct {
[Code].....
How do I access the array content? I'm suppose to strtok the contents from the lines stored in the array and use it again.
View 2 Replies
View Related
Nov 8, 2013
I'm trying to build the gtkmm library using MSVC. One of its source files declares a struct called BuiltinStockID together with some objects of that type - e.g.
Code:
// In the header file:-
namespace Gtk {
struct BuiltinStockID {
const char* id;
[Code] ....
GTKMM_API is obviously _declspec(dllimport) (or export) as appropriate. It seems a bit unusual to use extern in addition GTKMM_API but the code won't compile if I try to exclude it. The actual instantiations are in one of the library's source files- e.g.
Code:
// In a source file
const Gtk::BuiltinStockID APPLY = { GTK_STOCK_APPLY };
const Gtk::BuiltinStockID CANCEL = { GTK_STOCK_CANCEL };
const Gtk::BuiltinStockID OK = { GTK_STOCK_OK };
GTK_STOCK_APPLY etc are simple strings such as "gtk-apply". They mostly refer to image files for the library to load (in this case, for dialog button images) although that's probably not relevant to the problem.
If I run dumpbin /EXPORTS on the built DLL it does seem to have some exported symbols with the names Gtk::Stock::APPLY, Gtk::Stock::CANCEL, Gtk::Stock::OK etc. However, if I write this in one of my own source files:-
Code:
Gtk::BuiltinStockID MyStockID;
MyStockID = Gtk::Stock::CANCEL; // <--- debugger reports <Bad Ptr>
You can see that the Gtk::Stock::CANCEL object is invalid (my debugger reports it as a bad pointer). Likewise, if I try to pass Gtk::Stock::CANCEL as a parameter to a function.
View 13 Replies
View Related
Apr 7, 2013
I'm trying to compile the following and it doesn't work? How can I get the CString to initialize.
Code:
struct print {
int x; //row
int y; //col
int fid;
CString *data;
char *format;
[Code] .....
the char *format is not a problem, but compiler doesn't like CString *data;
tried CSting data and that also doesn't work, typecasting didn't work either?
View 14 Replies
View Related
Oct 24, 2013
In my Header file:
class MyData {
struct Fparams {
int i;
bool flag;
};
}
Now in CPP file:
void MyData::GetData() {
Fparams fParam;
fparam = AllData();
[Code] ....
Now i get an error saying - error: no match for 'operator=' in fparam = AllData(); ........
View 10 Replies
View Related
Sep 19, 2012
Code:
// mesh.h
struct D3DXMESHCONTAINER_DERIVED
{
};
// allocmeshhierarchy.h
#include "mesh.h"
void GenerateSkinnedMesh (LPDIRECT3DDEVICE9 pDevice, D3DXMESHCONTAINER_DERIVED* pMeshContainer);
Error C2011: D3DXFRAME_DERIVED repeated definition of d: users documents visual studio 2010 projects perfectsim v5.0 perfectsim v5.0 mesh mesh.h the 11 1 PerfectSim V5.0
What is correct linkage method?
View 5 Replies
View Related
Feb 28, 2013
I want to pass some parameters to a dialog. I am trying to pass a struct as LPARAM in CreateDialogParam. How to access this structure from ONOK for example?
Code:
struct DlgParam{
std::wstring IEDllPath;
CString folderName;
};
[Code] .....
View 7 Replies
View Related
Sep 20, 2014
I am not exactly sure how to do this and i keep running into problems. This is my code here that works.
Code:
#include<iostream>
using namespace std;
struct record {
double quiz1;
double quiz2;
double midyear, midyear_one;
[Code] .....
View 5 Replies
View Related
Oct 17, 2012
I have a basic vector/point class where I've overloaded a bunch of arithmetical operators:
Code:
#pragma once
class point {
public:
point() {
}
point(float p_x, float p_y, float p_z) : x(p_x), y(p_y), z(p_z)
[Code] ...
I can use it fine like
Code:
point p(50,50,50);
point q(50,50,50);
point t = p * q + q;
However when I put this point type into a struct and try to access the members after passing it through by const reference:
Code:
struct sextic {
point a,b,c,d,e,f,g;
};
inline static sextic sexticDifference(const sextic &p_sextic1, c
[Code] ....
This gives me an "operator not defined" error for compilation.
View 2 Replies
View Related
Sep 14, 2014
#include <stdio.h>
#define MAX_USERS 20
struct {
char ID[10];
char Name[40];
int Pos;
[Code] .....
I was attempting something weired with address to move data around when I discovered that the size of the array is not what I expected. I am passing this structure as &Users to a function that declares it as a void *, then I can deal with chunks of data (memmove) and not have to worry about index or things like that. However...sizeof is returning something I do not understand.
View 9 Replies
View Related
Apr 26, 2013
I have a jpg file. I have extracted the width and the length of the image. I have done that with some codes and markers. Now I need the image data starts as from that place i would like read the data and print the pixel value. I would like to display the pixels later.
View 2 Replies
View Related
Feb 9, 2013
So I'm trying to do a homework assignment, where I read a uml about a bank program, and just create it. Here is the UML. So while working on Bank, the top one, i've come up with this so far.
Code:
#include <iostream>
#include <string>
using namespace std;
class bank
{ string name;
int routingNum;
[Code] ....
I'm assuming that's what the uml wants. However I can't seem to access that private class. Idk why. I declared it as an object in the main.
View 4 Replies
View Related
Feb 12, 2014
I am trying to read and store a txt file with format below:
2.5;abc;2,4000
2.5;bef;3,2000
2.5;ref;3,1000
I try the fscanf( pFile, "%d;%s;%d,%d", buffer,buffer2,buffer3,buffer4 ); to store 2.5 to buffer, abc to buffer2, 2 to buffer 3 and 4000 to buffer 4 on first line.
However, it doesn't work. How can I achieve this? I want to read the 2nd line and so on.
Code:
char buffer[100]="";
char buffer2[100]="";
char buffer3[100]="";
char buffer4[100]="";
FILE * pFile=NULL;
pFile = fopen("C: est est.txt", "r");
[Code] ....
View 11 Replies
View Related
Feb 19, 2013
I have a 32-bit application that I've been maintaining for about 12 years and it runs on every Windows platform up to Windows 7. In all that time I've been using CWinApp::GetProfileXxxx() and CWinApp::WriteProfileXxxx() calls to read and write my program settings (about 70 settings) in the Registry. The settings are read from the Registry at start-up and written to the Registry when the program closes. There is also a method for the user to read and write the program settings to an INI file using the same code as the Registry access.
On my Windows 7 system the Registry read/write works just like it always has on all previous Windows versions. However, on some customer's Windows 7 machines there appears to be a problem with the Registry access. The program settings are either not being read from the Registry or are not being written to the Registry. I think the settings are not being written - but I don't know that. When the user uses the INI file the settings appear to be read and written.
The customer has complained a bit (I'd complain too) but doesn't have the time or doesn't want to take the time to run some simple tests for me to find out what's going on with his Windows 7 system.
So here is my question: Are there any user account settings or permissions that can block the program's access to the Registry? He claims he is an Administrator but I can't even get him to verify that.
View 5 Replies
View Related
Jan 7, 2015
Is it possible to read NFC card reader in VC++/MFC. Is it possible to develop a callback function that will read the NFC device, and see once the card is inserted, it takes that value from the card and store it in a DB?
View 3 Replies
View Related
Jun 26, 2013
I have used the following code to write and read wchar_t bytes from a disk file:
Code:
int WriteBytesW(wchar_t * wcp, int nsz, wchar_t * wcfilepath) {
wfstream wf;
codecvt_utf16<wchar_t, 0x10ffff, little_endian> ccvt(1);
locale wloc(wf.getloc(), &ccvt);
wf.imbue(wloc);
[Code] ....
Output:
save bytes succeeded
1234 5678 9ABC EF12 ABCD FE21 DCBA 1F2A EFFF 02FF
read bytes succeeded
nsz =: 20
Now, if wbuf[8] = 0xefff; is replaced by wbuf[8] = 0xffff;
Output:
save bytes succeeded
1234 5678 9ABC EF12 ABCD FE21 DCBA 1F2A 02FF
read bytes succeeded
nsz =: 18
Obviously, the 0xffff wbyte is not read. WHY ?
This presents a significant problem when attempting to read ALL wbytes from a file.
View 9 Replies
View Related
Feb 28, 2015
Im having trouble creating a struct within a struct node. the program suppose to hold students firstname, lastname, and gpa in a node therefore creating my linked list. Line 26 keeps saying that cannot convert parameter 2 from 'studentType to std::string
#include <iostream>
#include <string>
using namespace std;
struct studentType{
string firstname;
string lastname;
double gpa;
[code].....
View 2 Replies
View Related
Apr 10, 2013
I need to know about image processing whether it can be done using C /c++ as I am not familiar with MATLAB. I have attached one image. The arrow in the image show the indented circular portion. I need to crop out only the portion inside the indented portion. I think there should be a sharp difference in gradient intensity in pixel at the indented portion. Is it possible to extract that portion out by reading the binary image?
View 2 Replies
View Related
Mar 26, 2013
I have got an assignment. It is about comparing two files one file has sentences and the other abbreviations. so far i have managed to compare the abbreviations which appear in the sentence and erase punctuation linked to abbreviations.
However I am currently stuck on putting the punctuation back in when outputting the file. I am also stuck with replacing matching words in the sentences with the expanded abbreviations. Not sure which code to show. but sentences and abbreviations are below.
ABBREVIATIONS
Aberd Aberdeen
admin administration
approx approximate
Austral Australia
div division
Capt Captain
Comdr Commander
e east
HQ Head Quarters
m metres
mil million
mt Mount
n north
NATO North Atlantic Treaty Organisation
NSW New South Wales
pop population
s south
sq square
w west
Text file
NATO troops were on exercise in Aberd Capt Jones of the first div told Comdr Frank that his troops were near the E flank of the NATO forces. Complaining about the amount of Admin, Capt Jones radioed the NATO HQ asked for navigation relative to the HQ. The Captain then left.
For example the abbreviation "Aberd" in the sentence above needs to be replaced with Aberdeen from the abbreviations file. I need the last part of the abbreviation not "Aberd Aberdeen" need just "Aberdeen". Hope the info is understandable.
View 6 Replies
View Related
Jul 31, 2013
I just got a job programming a windows application. One of the requirements is reading and writing values from an excel spreadsheet. Looking online, it appears that C++ isn't the best (one of the worst?) languages for reading and writing values from excel files. Now the language I'm most familiar with is C++ and I've been looking at C#, and it appears to be much easier to read excel files.
View 8 Replies
View Related
