IsDllExistsInExport.cpp

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

#define RVATOVA(base,offset) ((LPVOID)((DWORD)(base)+(DWORD)(offset)))
#define VATORVA(base,offset) ((LPVOID)((DWORD)(offset)-(DWORD)(base)))

BOOL IsDllExistsInExport(IN HMODULE _hModule, const IN PCHAR DllName)
{
    HMODULE hModule = _hModule;
    if (hModule == NULL)
        hModule = GetModuleHandle(NULL);

    PIMAGE_OPTIONAL_HEADER poh = (PIMAGE_OPTIONAL_HEADER) ((PCHAR)hModule
        + ((PIMAGE_DOS_HEADER)hModule)->e_lfanew
        + sizeof(DWORD)
        + sizeof(IMAGE_FILE_HEADER));

    DWORD ImportBase = poh->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress;
    for (PIMAGE_IMPORT_DESCRIPTOR pid = (PIMAGE_IMPORT_DESCRIPTOR)RVATOVA(hModule, ImportBase); pid->Name; pid++)
    {
        PCHAR DllNameCurrent = (PCHAR)RVATOVA(hModule, pid->Name);
        if (!lstrcmpiA(DllNameCurrent, DllName))
            return TRUE;
    }
    return TRUE;
}

int main(int argc, char const *argv[])
{
    printf("%d\n", IsDllExistsInExport(NULL, "Kernel32.dll"));
    return 0;
}