Thread: Help a Beginner!

Hey, im making a DLL and i need some help. I need it to return the text in yellow. So what do I add to the following to do so. Here's what i have.

Code:

#include "dll.h"
#include <windows.h>
#include <iostream.h>

int main()
{

HANDLE hOut;

hOut = GetStdHandle(STD_OUTPUT_HANDLE);

SetConsoleTextAttribute(hOut,
                            FOREGROUND_RED | 
                            FOREGROUND_GREEN); }
                            
export double text(double string1, double string2)
  
{
       return (double) string1;
}

Also is it possible and if so, what steps do you take in searching a string for certain characters and words.

- Thanx

There isn't something like HTML where your output is written to the console as <color=yellow>yourstringhere</color>. SetConsoleTextAttribute changes attributes of the console window itself, so that any output written to the console has that specific attribute (i.e. color). Here's a function I made you could try and elaborate on:

Code:

#include <windows.h>
typedef enum colors 
{ 
	red = FOREGROUND_RED, 
	blue = FOREGROUND_BLUE, 
	green = FOREGROUND_GREEN 
};
void WriteColoredString(const char* s, short int color)
{
	DWORD dwNumChars;
	HANDLE hStdout = ::GetStdHandle(STD_OUTPUT_HANDLE);
	::SetConsoleTextAttribute(hStdout, color);


	/*
	 * std::cout << s;
	 * printf("%s", s);
	 */

	// Write string and change it back to white
	::WriteConsole(hStdout, s, strlen(s), &dwNumChars, 0);
	::SetConsoleTextAttribute(hStdout, FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
}
int main(int argc, char *argv[])
{
	WriteColoredString("hello\n", red);
	WriteColoredString("hello\n", blue);
	WriteColoredString("hello\n", green);
	return 0;
}

Okay, so in the DLL i need it to return text, so with

Code:

export double text(double string1, double string2)

How do i set that to be the colour?

Code:

#include "dll.h"
#include <windows.h>
#include <iostream.h>

typedef enum colors 
{ 
	red = FOREGROUND_RED, 
	blue = FOREGROUND_BLUE, 
	green = FOREGROUND_GREEN 
};

void WriteColoredString(const char* s, short int color)
{
	DWORD dwNumChars;
	HANDLE hStdout = ::GetStdHandle(STD_OUTPUT_HANDLE);
	::SetConsoleTextAttribute(hStdout, color);
	
	::WriteConsole(hStdout, s, strlen(s), &dwNumChars, 0);
	::SetConsoleTextAttribute(hStdout, FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
}
                            
export double text(double string1, double string2)
  
{
       return (double) string1;
}

Originally Posted by Mad Dawg

Code:

            
export double text(double string1, double string2)
  
{
       return (double) string1;
}

why are you passing a string as a floating point number?
change it to

Code:

            
std::string text(std::string& string1, std::string& string2)
  
{
      // do something useful here
       return string1;
}

to start with

Ya, but now it doesn't work you see because in the header file is:

Code:

#define export extern "C" __declspec (dllexport)

thats why i had:

Code:

export double text(double string1, double string2)
  
{
       return (double) string1;
}

Yes the whole double thing makes no sense. Well, I'm pretty proud with my latest experimentations with all this win32 console programming. The name decoration stumped me for a little while, but I finally got this ugly P.O.S.

The .DLL module

Code:

#define _WIN32_WINNT 0x0600
#include <windows.h>


__declspec(dllexport) char* __cdecl WriteColoredString(const char* s, short int color)
{
	DWORD dwNumChars;
	HANDLE hStdout = ::GetStdHandle(STD_OUTPUT_HANDLE);
	::SetConsoleTextAttribute(hStdout, color);


	/*
	 * std::cout << s;
	 * printf("%s", s);
	 */

	// Write string and change it back to white
	::WriteConsole(hStdout, s, strlen(s), &dwNumChars, 0);
	::SetConsoleTextAttribute(hStdout, FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
	return const_cast<char*>(s);
}

And the executable that loads it:

Code:

#include <windows.h>
#include <iostream>
typedef enum colors 
{ 
	red = FOREGROUND_RED, 
	blue = FOREGROUND_BLUE, 
	green = FOREGROUND_GREEN 
};
typedef char* (*LPFUNC) (const char*, short int);
int main(int argc, char *argv[])
{
	HINSTANCE hLib;
	hLib = ::LoadLibrary("C:\\Development\\Dev\\test\\test1\\Debug\\Project1.dll");
	if(hLib != NULL)
	{
		char* (*ourFunc)(const char*, short int) = 
			reinterpret_cast<char* (*) (const char*, short int)> 
			(::GetProcAddress(hLib, "_Z18WriteColoredStringPKcs"));
		if(ourFunc != NULL)
			(*ourFunc) ("hello", red);
		else std::cout << "Error loading function from DLL\n";
	}
	else 
		std::cout << "Error loading DLL\n";
	return 0;
}