licznik

#include <Windows.h>
#include "stdio.h"

TCHAR Class_Name[] = TEXT("OKNO_TEST");
MSG Komunikat;
char zmienna = 0;
char ilosc[128];
HINSTANCE *hInst;
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{


	switch (msg) {
	case WM_LBUTTONDOWN:
		zmienna++;
		sprintf(ilosc, "%d", zmienna);
		SetWindowTextA(hwnd,ilosc);
		break;
	case WM_CLOSE:
		if((MessageBox(hwnd,TEXT("Czy chcesz wyłączyć okno ?"),TEXT("Pytanie"),MB_OKCANCEL))==IDOK)
		DestroyWindow(hwnd);
		else break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProcW(hwnd, msg, wParam, lParam);
	}
	return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	hInst = &hInstance;
	WNDCLASSEX window;
	window.cbClsExtra = NULL;
	window.cbSize = sizeof(WNDCLASSEX);
	window.cbWndExtra = NULL;
	window.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
	window.hCursor = LoadCursor(*hInst, IDC_ARROW);
	window.hIcon = LoadIcon(*hInst, IDI_APPLICATION);
	window.hIconSm = NULL;
	window.hInstance = *hInst;
	window.lpfnWndProc = WndProc;
	window.lpszClassName = Class_Name;
	window.lpszMenuName = 0;
	window.style = NULL;

	if (!RegisterClassEx(&window)) {
		MessageBox(NULL, TEXT("Zarejestrowanie klasy nieudane! =("), TEXT("WARNING"), MB_OK | MB_ICONWARNING);
		return 1;
	}

	HWND okno1, okno2;
	okno1 = CreateWindowEx(WS_EX_WINDOWEDGE, Class_Name, TEXT("Okno 1"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 400, 400, NULL, NULL, *hInst, NULL);

	if (okno1 == NULL) {
		MessageBox(NULL, TEXT("Stworzenie okna nieudane! =("), TEXT("WARNING"), MB_OK | MB_ICONWARNING);
		return 2;
	}

	ShowWindow(okno1, nCmdShow);
	UpdateWindow(okno1);

	while (GetMessage(&Komunikat, NULL, 0, 0)) {

		TranslateMessage(&Komunikat);
		DispatchMessage(&Komunikat);
	}
	UnregisterClass(Class_Name, *hInst);
	return Komunikat.wParam;
}