Visual C++ :: Prevent DLL From Being Loaded / Injected
Dec 12, 2012
If you're writing a .dll you can prevent that dll from getting loaded into some processes by returning false from the dllmain.
I'm looking for a way to do it the other ay around. I have an exe, and I want to prevent a certain hook dll from getting loaded/injected into my exe.
A customer is running some software which loads a hook dll into our exe, and this is subsequently preventing our application from running as intended. Both our software as well as the third party app is required, and there is no way to get the third party dll changed. (no longer supported).
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Apr 10, 2013
I am using Visual Studio 2010 with WindowsXP 32 bit. when i placed break points in my solution and trying to debug then i am getting THE BREAKPOINTS CAN NOT BE HIT NO SYMBOLS HAVE BEEN LOADED FOR THIS DOCUMENT issue.
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Jan 21, 2013
I am getting "driver could not be loaded due to system error 8" error while connecting to SQL Server 2005 from VC++. Its also throwing out of memory error. Basically i am developing and ISAPI dll. I use the following code to connect to DB.
CDatabase DBConnection;
if(! DBConnection.IsOpen()) {
DBConnection.OpenEx("Driver={SQL Server};Server=10.120.110.30;Database=Test;Trusted_Connection=yes;", CDatabase:penReadOnly | CDatabase::noOdbcDialog);
[Code] .....
for CDatabaseConnection, i can see 2 different method to open the connection, OpenEx and Open. Whats the difference between OpenEx and Open?
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Aug 30, 2013
I would like to programmatically monitor a directory for new files, and if the file happens to be an executable, I want to prevent it from running. Something like a AV program.
However, I don't know where to start. Simple is best.
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May 20, 2014
I know I can set the window properties on creation, but I'm trying to figure out how to prevent a window from being able to be moved or resized. I've been looking online and it looks like it involves overriding the WM_SIZE, WM_SIZING, or perhaps the WM_WINDOWPOSCHANGED message handlers. I want to be able to have a menu option that "locks" the window position, and of course allows normal window behavior when the option isn't checked.
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Sep 17, 2014
For example, I have a game loading to start up .. How can I check if it completely loaded?
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Jan 17, 2013
how is it done?
ex. mp3player keeps songs loaded
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Mar 19, 2014
I am compiling using Microsoft Visual C++ and I am trying to create a program that ask's the user for 10 numbers, and these numbers will have to be loaded into a one dimensional array of 10 elements. I read up online as well as my book and looked at sample programs, then created mine which was similar to the sample programs I looked at, but the sample ones compile , while I get C2059 and C2061 Syntax Errors. I am new to programming so I understand it could be one small thing but I after looking over it I am completely clueless.
Heres my program:
Code:
#include
<iostream>
int
main()
[Code] .....
My program is also attached
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Jan 19, 2014
I'm working on a program that can load all words from a dictionary "English2.txt" (it's attached to the post), then put every word into a 2-dimensional matrix (every line is reserved for one word) and display them. After loading every word into a matrix, when I try to display first 8 words with printf, I can't do it without '' at the end of a line. Otherwise only the 8th word is displayed... What's more, when I try to read the length of the first word with strlen, it says, that it has 4 characters (in fact there are only 3 and it's the word "AAA"). What could be the reason for that?
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
int main()
{
FILE *fp;
char buffer[32];
[Code]...
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Apr 22, 2013
I have a question about a dynamically loaded library I am using. I have called it SqlWrite, it is for connecting and writing to a Microsoft SQL server DB. I have a function in it that is defined as:
extern "C" {
__declspec(dllexport) RETCODE __cdecl SqlExecS(SQLHANDLESTR* h, LPCSTR Statement) {
RETCODE RetCode;
std::string input = Statement;
std::wostringstream conv;
conv << input.c_str();
std::wstring wCmd(conv.str());
[Code] ....
I then load it in another MSVC project as:
#ifdef WIN32//C:UsersaDocumentsVisual Studio 2012ProjectsGetPageSourceDebugGetPageSource.dll
#pragma message("WIN32 is defined")
#ifdef _DEBUG
SetErrorMode(0);
[Code] ....
As you can see, inside the prototyped function "SqlExecSP", I cout (or, rather, wcout for wide characters) the sql statement i am running, and the return code of the sql statement. a sql return code of "0" is equivalent to "SQL_SUCCESS". Then, I cout " got player again " after executon of SqlExecSP alias SqlExecS.
This usually works, and gives me following sample output:
exec SELECT [PlayerID], [FirstName], [LastName], [TeamID] FROM [soccer].[dbo].[Players] WHERE LastName = 'Abdellaoue' AND FirstName = 'Mohammed' retcode 0
RETURNING FROM EXECSP NOW!!!
got player again
However, sometimes, the program crashes somewhere between outputting "RETURNING FROM EXECSP NOW!!!" and outputting " got player again ", i.e. the output is then:
exec SELECT [PlayerID], [FirstName], [LastName], [TeamID] FROM [soccer].[dbo].[Players] WHERE LastName = 'Abdellaoue' AND FirstName = 'Mohammed' retcode 0
RETURNING FROM EXECSP NOW!!!
As you can see, it doesn't output the next line " got player again ", because it somehow crashes in between.
However,t he only line that should be executed between this, as far as I can understand, is the actual return of the DLL function SqlExecS, prototyped as SqlExecSP in my calling code, i.e. the only line that should be executed in between is:
return RetCode;
However, somehow, this fails, even though RetCode is "0", as I can see at the end of the output
exec SELECT [PlayerID], [FirstName], [LastName], [TeamID] FROM [soccer].[dbo].[Players] WHERE LastName = 'Abdellaoue' AND FirstName = 'Mohammed' retcode 0
Now, why sometimes this crashes, and sometimes this works. I.e, I can sometimes call this function x times, and it doesnt fail, outputting " got player again " right after the calls, and sometimes, it fails somewhere in between, at call x, y, or z, i.e. sometimes i can execute it ten times successfully and sometimes i can't, even though the return code is still 0, and it just fails somewhere in between. I am not sure if it has to do with the call being a call to a dynamically loaded DLL function, but I can't see where else the error is.
Why this can be failing, and at different, seemingly random times?
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Oct 21, 2014
I have a project which I started. then tried to add the directx toolkit to the project referenced it but now my program wont load.
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Apr 18, 2013
I have two projects (Projects A and B). Project A is a dll project, defining a function called "regex".
Project B dynamically loads this DLL, and calls Project A's "regex" function via LoadLibrary/GetProcAddress.
Regex takes a pointer to an std::vector (std::vector<std::cmatch>).
When debugging ProjectB, I can see that, within the code from ProjectA (in the "regex" call), a loop that loops through the elements of the vector outputs all the elements in the vector to console as expected. But the loop in ProjectB ( which executes after ProjectA), which also loops through the vector, and, is supposed to output the elements of the vector, outputs empty strings, not, as I would expect, the same strings (which contain results), as in the loop in Project A.
How is this happening. Does this have anything to do with it being a DLL, and, maybe, somehow values/memory addresses (or something similar) of the vector/its elements being destructed across the Projects/Dlls?
Output and Code See Below:
Output Loop in A:
Un
Un
Output Loop in B: (empty) (i.e. none)
Project A DLL Header (interface.h):
#include "stdafx.h"
#include <vector>
#include <regex>
extern "C" {__declspec(dllexport) int __cdecl regex(std::string target,std::string rgx, std::vector<std::cmatch*>* matches);}
[Code].....
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Feb 21, 2014
I wrote a program that use a struct to represent an athlete. The program allocates memory for an array of 5 Athletes, and, soon after I enter the fourth data (height) for the first athlete, I get the message "runtime Error R6002 - floating point support not loaded". The program doesn't reach the line where __LINE__ would be printed.
Code:
#include <stdio.h>
#include <stdlib.h>
typedef struct athlete {
char name[ 100 ];
char sport[ 100 ];
double height;
[Code] .......
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Feb 18, 2014
i am writing a function that takes a delimited string and splits the strings into it's respective words according to the delimeter.
1) iterate through string and store delimeter position in vector array.
2) iterate through again and use substr to split into words and store again in a vector.
I then have a dictionary file, and am comapring each values in the string with each in the dictionary, problem is that it overruns the loop and obviously gives a subscript out of range error.
Code:
#include <iostream>#include <fstream>
#include <vector>
using namespace std;
//Start with string inputString
//Find delimeters ::pos as ints and stores positions in vector <int> array
//Run though string using 'find' and seperate string by positions of char32s
//Build vector<string> array of individual words in string
//Open dictionary file and loop though testing each words in vector string array against each word in dictionary
[code]....
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Oct 17, 2014
I created program that insert employes data and then print their data but never accept duplicate age if user entered duplicated age prompt him to enter another age (age must be unique)
Code:
#include<conio.h>
#include<stdio.h>
#define size 3
struct emp
{
int age,overtime,dedcution,netsal;
float salary;
[Code] .....
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Apr 4, 2013
I want to prevent to type zero as the first digit in value in c code
Code:
char next_buffer[ 5 ];
int frame_counter;
int digit_counter;
memset( cmd->next_buffer, 0, sizeof( cmd->next_buffer ) );
cmd->frame_counter = 0;
cmd->digit_counter = 0; Code: if( arg && isdigit( arg[ 0 ] ) {
[Code].....
this write in text box numbers from keypad for example
5 0 2 4 9
After each typed digit, here is a underscore line waiting for the next to type next digit. I want to prevent users to type zero as the first digit in value.
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Dec 7, 2014
Recently I was looking into embedded programing of AVR microcontrollers.
At this site [URL] ....
I have encounter some code that implements delay
asm volatile ("nop");
From what I understand it is assembler code that creates delay - one processor clock long.
For C/C++ language it should be like ; or {} = null statement.
Now my question is how to implement this C/C++ code and prevent my compiler (WinAVR: AVR-GCC) to delete this command during optimization (-Os or -O2). Or is it simply better to use the assembler function.
I know I can use for-loop
volatile uint8_t foo
for(foo=0; foo<2; ++foo){}
but for that I have to create a variable = wasting 1 byte of RAM; correct?
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Feb 14, 2014
I have an issue where I iterate through devices and make driver API calls. Unfortunately, these calls take too much time and they are interrupting my real-time scheduler. I have 12 cores, of which one is 100% and the others are < 1%.
I'd like to multi-thread this thing. So far, I've replaced:
for (DeviceIterator d = devices.begin(); d != devices.end(); ++d) {
d->Write(words, numwords);
}
with
void* ThreadedWrite(void* p) {
WritePackage* wp = (WritePackage*)p;
wp->device->Write(wp->words, wp->numwords);
delete[] wp->words;
delete wp;
[Code]...
My problem is that this didn't improve performance at all. The main thread still takes too long to execute. Is there something I need to do to prevent the main thread from blocking?
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Nov 16, 2014
After I have compiled and executed code below, and I have made an input of a string, the while loop takes over the control and outputs an endless flow sentences. How can I make sure when an input of string is made, such a thing does not happen? In Python, one can make a type check by the use of type() command, but such a command does not exist in C, so how can I prevent an endless output in case a string input is made by the user?
(The code below is supposed to check whether the number entered by the user is divisible by 7 or not.)
#include <stdio.h>
int main() {
int a = 0;
printf("Input a number!");
while (1 < 2){
scanf("%d", &a);
if (a % 7 == 0) {
[Code] ....
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Dec 10, 2014
I have some code which triggers an alarm when an ascii number is read in on the com port:
In that code, i have it send an email to let me know i have an alarm. The problem is it keeps sending the email over and over until i cancel the alarm. Inbox gets full real quick!
Im having trouble implementing a way to send the email just once! Ive googled as much as i can find but i cant get any way to work.
//QT TANK TEMP TOO LOW:
if (ALARM_TYPE_Value == "5") {
ALARM_TYPE_tb.BackColor = Color.Red;
ALARM_TYPE_tb.Text = " **ALARM**" + Environment.NewLine + " ";
ALARM_TYPE_tb.Text += "
[Code] ....
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Oct 17, 2014
I created program that insert employes data and then print their data but never accept duplicate age if user entered duplicated age prompt him to enter another age (age must be unique)
Here is my code
#include<conio.h>
#include<stdio.h>
#define size 3
struct emp {
int age,overtime,dedcution,netsal;
[Code] .....
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Oct 19, 2013
I know how to do it in C, but in C++?
Here is my code. Let the variables be of type double.
Code:
while(infile) // Will read the last line twice
{
if(!N)//Read first line of file
{
infile >> d;
infile >> N;
infile >> epsilon;
infile >> t;
[Code] .....
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Sep 13, 2013
Let say i have a following scenario:
a function like this.
Code:
template <typename T1>
print (T1 x){
cout << x << "
";
}
How do I prevent user passing a class or a structure or aanoter function to my function print. I mean i know if a wrong thing is passed that i'll get an error eventually but is there a way to explicitly check what has been passed. How is this done usually ?
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Mar 12, 2013
i am trying to read a string using fgets and storing in an array i want to prevent fgets from storing the new line character on the array using the shortest means possible..
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Sep 25, 2013
TheC language program environment does nothing to prevent buffer overflows ..... is there any pros to the obvious cons of this?
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Sep 17, 2013
I created a C program that extracts some information from computer and displays it on screen. It is completed today and is going to be applied to startup programs of domain machines. It runs at logon and takes somewhat 5-10 seconds to finish execution. The output is shown on console screen & user can either close the window by clicking on 'x' or pressing 'Ctrl+c' during execution. How do i prevent both of these events?
Basically the most time consuming processes are
Code: popen("systeminfo","r");
popen("wmic qfe get installedon","r");
1st command is getting OS name,version and hotfixes installed.
2nd command gives me the date of updates installed.
I then filter out data & print required information only.
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