Thread: Help with simple console to dll code

Originally Posted by crazybucky

Any examples? Sorry to be suck a pain!

The DLL

Code:

// myDLL.cpp
// Compile: cl.exe /LD myDLL.cpp

#include <string.h>

#define DECLARE_EXPORT __declspec(dllexport)

extern "C"
{
    DECLARE_EXPORT void myFunction( char* pIn, unsigned char * pOut )
    {
	int v, vlen;	
	
	vlen = strlen(pIn);
	   for(v = 0; v < vlen; v++)
	pOut[v] =  pIn[v] + 1;   
    }
}

The calling code

Code:

// Example of explicit linking of DLL
#include <windows.h>
#include <stdio.h>

// Function pointer
typedef void (*myFunction)(char *, unsigned char *);

int main(void)
{
	myFunction _myFunction;
	char cInput[] = {"AS0100012178 2178"};
	unsigned char ucReturn[24] = {0};
	int iIndex;
	HINSTANCE hInstLibrary = LoadLibrary("myDLL.dll");

	if (hInstLibrary)
	{
		_myFunction = (myFunction)GetProcAddress(hInstLibrary, "myFunction");
		if (_myFunction)
		{
			 _myFunction(cInput, ucReturn);
			for(iIndex = 0; iIndex < strlen(cInput); iIndex++)
				printf("%c         %c  0x%02X\n", cInput[iIndex], ucReturn[iIndex],ucReturn[iIndex]);
		}
		else printf("_myFunction failed to initialize\n");
		FreeLibrary(hInstLibrary);
	}
	else printf("myDLL.dll failed To Load!\n");
	return 0;
}