Keys fra tastatur C++

Kode 

case WM_KEYDOWN
   switch(wParam)
   {
     case WM_CHAR:
   }

Kode 

#include <windows.h>
#include <iostream>
#include <fstream>


enum WindowsId
{
   FirstEditId = 256,
   SecondEditId,
   ResultEditId,
   ButtonId
};

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR lpCmd, int nShow);
void getKey();

HINSTANCE hInsta;
WPARAM wParameter;
LRESULT CALLBACK MainWndProc(HWND hwnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{
        wParameter = wParam;
 switch(nMsg)
 {
 case WM_CREATE:
{
CreateWindowEx(WS_EX_CLIENTEDGE,
"EDIT",
"",
WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_GROUP,
250, 20, 500, 600,
hwnd,
(HMENU)(FirstEditId),
hInsta,
0);
}
break;
  case WM_KEYDOWN:
  {
       getKey();      
       switch(wParam)
       {
       case WM_CHAR:
      {
         
      }
      break;
        case VK_UP:
             PostQuitMessage(0);
        break;
       }
  }
  break;
  
  case WM_DESTROY:
  PostQuitMessage(0);
  break;             
 }
return DefWindowProc(hwnd, nMsg, wParam, lParam);       
}

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR lpCmd, int nShow)
{

 hInsta = hInst;
 WNDCLASSEX wc;
 
memset(&wc, 0, sizeof(WNDCLASSEX));
wc.lpszClassName = "MainWindow";
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = MainWndProc;
wc.hInstance = hInst;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

RegisterClassEx(&wc);

HWND Window = CreateWindow("MainWindow","Trace It!", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT , CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInst, NULL);

MSG msg;

ShowWindow(Window, nShow);
UpdateWindow(Window);

while(GetMessage(&msg, NULL, 0, 0) > 0)
{
 TranslateMessage(&msg);
 DispatchMessage(&msg);                       
}
return msg.wParam;
}

void getKey()
{
std::ifstream fil("D:\\\\test.txt");
if(char(wParameter) == 'A')
{
char cha = 'a';                   
fil << 123;                
}
if(char(wParameter) == 'B')
{
fil >> "b";                  
}
if(char(wParameter) == 'C')
{
fil >> "c";
}
if(char(wParameter) == 'D')
{
fil >> "d";
}
if(char(wParameter) == 'E')
{
fil >> "e";
}
if(char(wParameter) == 'F')
{
fil >> "f";
}
if(char(wParameter) == 'G')
{
fil >> "g";
}
if(char(wParameter) == 'H')
{
fil >> "h";
}
if(char(wParameter) == 'I')
{
fil >> "i";   
}
if(char(wParameter) == 'J')
{     
fil >> "j";
}
if(char(wParameter) == 'K')
{
fil >> "k";  
}
if(char(wParameter) == 'L')
{
fil >> "l";
}
if(char(wParameter) == 'M')
{
fil >> "m";         
}
if(char(wParameter) == 'N')
{
fil >> "n";         
}
if(char(wParameter) == 'O')
{
fil >> "o";    
}
if(char(wParameter) == 'P')
{
fil >> "p"; 
}
if(char(wParameter) == 'Q')
{
fil >> "q";                                   
}
if(char(wParameter) == 'R')
{
fil >> "r";            
}
if(char(wParameter) == 'S')
{
fil >> "s";       
}
if(char(wParameter) == 'T')
{
fil >> "t";          
}
if(char(wParameter) == 'U')
{
fil >> "u";           
}
if(char(wParameter) == 'V')
{
fil >> "v";             
}
if(char(wParameter) == 'W')
{
fil >> "w";               
}
if(char(wParameter) == 'X')
{ 
fil >> "x";          
}
if(char(wParameter) == 'Y')
{
fil >> "y";             
}
if(char(wParameter) == 'Z')
{
fil >> "z";                
}
                       
}

Kode 

case WM_KEYDOWN:
   switch(wParam)
   {
   }
   break;
case WM_CHAR:
   switch(wParam)
   {
   }
   break;

Kode 

    case WM_CHAR:
      {
         std::ofstream Fil("c:/test.txt", std::ios::app);
         Fil << char(wParam);
      }
      break;