How to call a DLL function from another DLL in C, How to call a DLL function from another DLL in C launguage

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rr.kalaiyrasan

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Can some one please explain How to call a DLL function from another DLL in C launguage?

huntingspace

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Joined: 11-February 12

First way:

CODE

#include <stdio.h>

extern "C" __declspec(dllimport)double AddNumbers(double a, double b);

int main(int argc, char **argv)
{
double result = AddNumbers(1, 2);
printf("The result was: %f\n", result);
return 0;
}

Second way:

CODE

#include <windows.h>
#include <stdio.h>

typedef double (*importFunction)(double, double);

int main(int argc, char **argv)
{
importFunction addNumbers;
double result;

HINSTANCE hinstLib = LoadLibrary("Example.dll");
if (hinstLib == NULL) {
printf("ERROR: unable to load DLL\n");
return 1;
}

addNumbers = (importFunction)GetProcAddress(hinstLib, "AddNumbers");
if (addNumbers == NULL) {
printf("ERROR: unable to find DLL function\n");
return 1;
}

result = addNumbers(1, 2);

FreeLibrary(hinstLib);

printf("The result was: %f\n", result);

return 0;
}

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