The following code results in simple window which stops responding as soon as it is executed.
i really have no idea what is happening, i am just starting visual c++


#include<windows.h>
#include<stdio.h>
#ifndef UNICODE
#define UNICODE
#endif

LRESULT CALLBACK windowprocess (HWND hwindow, UINT uMsg, WPARAM wParam, LPARAM lParm);

int WINAPI wWinMain (HINSTANCE hInstance, HINSTANCE, PWSTR pCmdLine, int nCmdShow)

{
WNDCLASSEX wc ={};
wc.lpfnWndProc = windowprocess;
static LPCSTR CLASS_NAME = "Starter Window Class";
wc.lpszClassName = CLASS_NAME;
wc.hInstance = hInstance;
wc.cbSize = sizeof(WNDCLASSEX);

RegisterClassEx (&wc) ;

HWND hWnd;
hWnd = CreateWindowEx ( 0, // Optional window styles.
CLASS_NAME, // Window class

"Starter App", // Window text
WS_OVERLAPPEDWINDOW, // Window style

// Size and position
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,

NULL, // Parent window
NULL, // Menu
hInstance, // Instance handle
NULL // Additional application data
);

// printf("Window created");
if(!hWnd)
{return 0;}
// printf("window verified");
ShowWindow(hWnd, nCmdShow);

LPMSG Msg;
while(GetMessage(Msg, hWnd, 0, 0))
{
TranslateMessage(Msg);
DispatchMessage(Msg);
}


return 0;
}


LRESULT CALLBACK windowprocess (HWND hwindow, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch(uMsg)
{
case WM_DESTROY:
PostQuitMessage(0);
return 0;
break;

case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hwindow, &ps);
FillRect(hdc, &ps.rcPaint, (HBRUSH) (COLOR_WINDOW+1));
EndPaint(hwindow, &ps);
}
break;

default:
return DefWindowProc(hwindow, uMsg, wParam, lParam);


}
}