N00b hax: OpenProcess access denied

void SetSeDebug()
{
	HANDLE hToken;
	LUID seDebugValue;
	TOKEN_PRIVILEGES tPriv;
	
	ZeroMemory(&tPriv, sizeof(tPriv));
	if(!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) {
		MessageBox(NULL, "OpenProcessToken failed.\nDLL injection may not work.\n", "Error", MB_ICONEXCLAMATION);
		return;
	}
	
	if(!LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &seDebugValue)) {
		MessageBox(NULL, "LookupPrivilegeValue failed.\nDLL injection may not work.\n", "Error", MB_ICONEXCLAMATION);
		CloseHandle(hToken);
		return;
	}
	
	tPriv.PrivilegeCount = 1;
	tPriv.Privileges[0].Luid = seDebugValue;
	tPriv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
	
	if(!AdjustTokenPrivileges(hToken, FALSE, &tPriv, sizeof(tPriv), NULL, NULL) || GetLastError() != 0)
		MessageBox(NULL, "AdjustTokenPrivileges failed.\nDLL injection may not work.\n\nTry running this program as an administrator.", "Error", MB_ICONEXCLAMATION);
	CloseHandle(hToken);
}

int DllInject(HWND hDialog, DWORD procID, LPCSTR dllName)
{
	int response;
	char msg[1024];
	HANDLE proc;
	LPVOID remoteStr, loadLibrary;
	
	sprintf(msg, "You have chosen to inject %s into process %d. Do you want to continue?", dllName, procID);
	response = MessageBox(hDialog, msg, "Message", MB_YESNO | MB_ICONQUESTION);
	if(response != IDYES)
		return 1;
	if(procID == 0)
		return 2;
	
	proc = OpenProcess(CREATE_THREAD_ACCESS, FALSE, procID);
	if(proc == 0) {
		sprintf(msg, "Failed to open the process: %d", GetLastError());
		MessageBox(hDialog, msg, "Error", MB_ICONEXCLAMATION);
		return 3;
	}
	
	loadLibrary = (LPVOID) GetProcAddress(GetModuleHandle("kernel32.dll"), "LoadLibraryA");
	remoteStr = (LPVOID) VirtualAllocEx(proc, NULL, strlen(dllName), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
	WriteProcessMemory(proc, (LPVOID) remoteStr, dllName, strlen(dllName), NULL);
	CreateRemoteThread(proc, NULL, 0, (LPTHREAD_START_ROUTINE) loadLibrary, (LPVOID) remoteStr, 0, NULL);
	
	CloseHandle(proc);
	MessageBox(hDialog, "DLL successfully injected into process.", "Message", MB_ICONINFORMATION);
	return 0;
}