Windows Program in C Not Working - c

Question

I need to make a few programs in C and i cannot get the window to work. Its come up with about 30 errors mostly saying ; is expected when there is one there, no storage class or type specifier, and declaration expected, not sure what these mean. I have looked at two turtorials and they both look extremely similar and mine looks the same, so not sure what these missing things are.
Heres my code
#include <windows.h>
LRESULT CALLBACK WindowFunc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hThisInst,
HINSTANCE hPrevInst,
LPSTR lpszArgs,
int nWinMode);
{
WNDCLASS wcls;
HWND hwnd;
MSG msg;
LPCWSTR szClassName = L"ThreadsProgram";
LPCWSTR szWinName = L"My Threads Program"
//Register Class
wcls.style =0;
wcls.lpfnWndProc =WindowFunc;
wcls.cbClsExtra =0;
wcls.cbWndExtra =0;
wcls.hInstance =hThisInst;
wcls.hIcon =LoadIcon(NULL, IDI_APPLICATION);
wcls.hCursor =LoadCurser(NULL, IDC_ARROW);
wcls.hbrBackground =(HBRUSH)GetStockObject(WHITE_BRUSH);
wcls.lpszMenuName =NULL;
wcls.lpszClassName =szClassName;
if(!RegisterClass(&wcls))
{
MessageBox(NULL, "Window Registration Failed!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
//Make Window
hwnd = CreateWindow(szClassName,
szWinName,
WS_OVERLAPPINGWINDOW,
100,
100,
400,
400,
HWND_DESKTOP,
NULL,
hThisInst,
NULL);
//Show Window
if(hwnd == NULL)
{
MessageBox(NULL, "Window Failed!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hwnd, nWinMode);
UpdateWindow(hwnd);
//Main Message Loop
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}

Answer 1

The first problem I see is here:
int WINAPI WinMain(HINSTANCE hThisInst,
HINSTANCE hPrevInst,
LPSTR lpszArgs,
int nWinMode); /* <---- This semi-colon causes grief! */
{
WNDCLASS wcls;
You have a declaration of a function because of the semicolon after int nWinMode);.
Remove it.
There may also be other problems; I didn't look further and don't plan to do so. The compiler will guide you if your own code review won't help.

Answer 2

A lot of typos there.
semicolon after the WinMain
MessageBox() function taking 3 instead of 4 params.
LPWCSTR params
ShowWindow() with nCmdShow doesn't ... show
WS_OVERPLAPPEDWINDOW (not WS_OVERLAPPINGWINDOW)
LoadCursor instread of LoadCurser
Should work now. Next time type carefully
#include <windows.h>
LRESULT CALLBACK WindowFunc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CLOSE: DestroyWindow(hwnd); break;
case WM_DESTROY: PostQuitMessage(0); break;
default: return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hThisInst, HINSTANCE hPrevInst, LPSTR lpszArgs, int nWinMode)
{
WNDCLASS wcls;
HWND hwnd;
MSG msg;
LPCSTR szClassName = "ThreadsProgram";
LPCSTR szWinName = "My Threads Program";
//Register Class
wcls.style =0;
wcls.lpfnWndProc =WindowFunc;
wcls.cbClsExtra =0;
wcls.cbWndExtra =0;
wcls.hInstance =hThisInst;
wcls.hIcon =LoadIcon(NULL, IDI_APPLICATION);
wcls.hCursor =LoadCursor(NULL, IDC_ARROW);
wcls.hbrBackground =(HBRUSH)GetStockObject(WHITE_BRUSH);
wcls.lpszMenuName =NULL;
wcls.lpszClassName =szClassName;
if(!RegisterClassA(&wcls))
{
MessageBoxA(NULL, 0, "Window Registration Failed!", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
//Make Window
hwnd = CreateWindowA(szClassName, szWinName,
WS_OVERLAPPEDWINDOW,
100, 100, 400, 400,
HWND_DESKTOP,
NULL, hThisInst, NULL);
//Show Window
if(hwnd == NULL)
{
MessageBoxA(NULL, 0, "Window Failed!", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hwnd, SW_SHOW/*nWinMode*/);
UpdateWindow(hwnd);
//Main Message Loop
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}