SetWindowsHookEx with WH_KEYBOARD stuck in a loop/queue - c++

Question

I am trying to hook a Notepad with dll-injection. After the exe is run and hooks the Notepad (form what I can tell successfully) and some keys are pressed, what seems to happan is that the key presses get stuck in a loop or a queue (Notepad not responding). After the exe unhooks the Notepad responds and all pressed keys appear in the text field.
exe
#include <iostream>
#include <fstream>
#include <windows.h>
#include <stdio.h>
HHOOK hHook = NULL;
HWND handle = NULL;
HMODULE dll = NULL;
HOOKPROC address = NULL;
DWORD thread_id = 0;
using namespace std;
int main(){
handle=FindWindow(NULL,L"Untitled - Notepad");
if(handle==NULL){
cout<<"Window not found"<<endl;
getchar();
return 0;
}
thread_id=GetWindowThreadProcessId(handle,NULL);
if(thread_id==0){
cout<<"ID not found"<<endl;
getchar();
return 0;
}
dll = LoadLibrary(TEXT("X:\\qt\\hook\\debug\\hook.dll"));
if(dll==NULL){
cout<<"hook.dll not found"<<endl;
getchar();
return 0;
}
address=(HOOKPROC)GetProcAddress(dll,"CallWndProc#12");
if(address==NULL){
cout<<"Address not found"<<endl;
getchar();
return 0;
}
hHook=SetWindowsHookEx(WH_KEYBOARD,address,dll,thread_id);
if(hHook==NULL){
cout<<"hook was not set"<<endl;
return 0;
}
cout<<"Program successfully hooked"<<endl;
cout<<"Press enter to unhook the function and stop the program"<<endl;
getchar();
UnhookWindowsHookEx(hHook);
return 0;
}
dll
#include "hook.h"
#include <windows.h>
#include <iostream>
#include <fstream>
using namespace std;
extern "C"{
__declspec(dllexport) LRESULT CALLBACK CallWndProc(int nCode,WPARAM wParam,LPARAM lParam){
if(nCode<0){
return CallNextHookEx(NULL,nCode,wParam,lParam);
}
ofstream file;
file.open("X:\\qt\\klog\\debug\\function.txt");
file<<"Function keyboard_hook called\n";
file.close();
return CallNextHookEx(NULL,nCode,wParam,lParam);
}
}
BOOL APIENTRY DllMain(HMODULE hDLL, DWORD Reason, LPVOID Reserved){
switch(Reason) {
case DLL_PROCESS_ATTACH: break;
case DLL_PROCESS_DETACH: break;
case DLL_THREAD_ATTACH: break;
case DLL_THREAD_DETACH: break;
}
return TRUE;
}

Answer 1

Adding an message loop between SetWindowsHookEx and UnhookWindowsHookEx fixed it
while(GetMessage(&Msg, NULL, 0, 0) > 0)
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}