#include <Windows.h>
#include <stdlib.h>
LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
BOOL CALLBACK EnumChildProc(HWND hWnd, LPARAM lParam);
TCHAR szClassName[] = TEXT("PassGenWnd");
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	HWND hWnd, hButton, hEdit, hStatic, hAbout;
	MSG Msg;
	WNDCLASSEX wcex;
	
	wcex.cbClsExtra = 0;
	wcex.cbSize = sizeof(WNDCLASSEX);
	wcex.cbWndExtra = 0;
	wcex.hbrBackground = (HBRUSH) COLOR_WINDOW;
	wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
	wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
	wcex.hInstance = hInstance;
	wcex.lpfnWndProc = WndProc;
	wcex.lpszClassName = szClassName;
	wcex.lpszMenuName = NULL;
	wcex.style = CS_HREDRAW | CS_VREDRAW;

	RegisterClassEx(&wcex);

	hWnd = CreateWindowEx(WS_EX_OVERLAPPEDWINDOW, szClassName, TEXT("Secure Password Generator"), WS_VISIBLE | WS_SYSMENU, 100, 100, 300, 100, NULL, NULL, hInstance, NULL);
	hButton = CreateWindowEx(0, TEXT("BUTTON"), TEXT("Generate"), WS_VISIBLE | WS_CHILD, 190, 38, 100, 30, hWnd, NULL, hInstance, NULL);
	hStatic = CreateWindowEx(0, TEXT("STATIC"), TEXT("If you decide to use one of these passwords, do not forget it!"), WS_VISIBLE | WS_CHILD, 0, 0, 290, 20, hWnd, NULL, hInstance, NULL);
	hEdit = CreateWindowEx(WS_EX_CLIENTEDGE, TEXT("EDIT"), TEXT(""), WS_VISIBLE | WS_CHILD | ES_READONLY, 0, 20, 290, 20, hWnd, NULL, hInstance, NULL);
	hAbout = CreateWindowEx(0, TEXT("STATIC"), TEXT("Made by Govind on Sythe.org"), WS_VISIBLE | WS_CHILD, 0, 40, 160, 20, hWnd, NULL, hInstance, NULL);
	ShowWindow(hWnd, SW_SHOW);
	EnumChildWindows(hWnd, EnumChildProc, MAKELPARAM(FALSE, 0));
	UpdateWindow(hWnd);
	
	while(GetMessage(&Msg, NULL, 0, 0) > 0)
	{
		TranslateMessage(&Msg);
		DispatchMessage(&Msg);
	}
	return Msg.wParam;

}



BOOL CALLBACK EnumChildProc(HWND hWnd, LPARAM lParam)
{
	HFONT hfDefault = (HFONT) GetStockObject(DEFAULT_GUI_FONT);
	SendMessage(hWnd, WM_SETFONT, (WPARAM) hfDefault, MAKELPARAM(FALSE, 0));
	return TRUE;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
	PAINTSTRUCT ps;
	switch(Msg)
	{
	case WM_CLOSE:
		DestroyWindow(hWnd);
		break;
	case WM_COMMAND:
		srand((unsigned)GetTickCount());
		if((HWND)lParam==FindWindowEx(hWnd, 0, TEXT("BUTTON"), 0))
		{
			TCHAR szTable[] = TEXT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890,.`~!@#$%^&*()_+=-;:[{]}\\|/\?<>\'\"");
			int len = wcslen(szTable);
			int pwlen = 12+rand()%6;
			int i;
			TCHAR newPass[19];
			HWND hEdit = FindWindowEx(hWnd, 0, TEXT("EDIT"), 0);
			for(i = 0; i < pwlen; i++)
			{
				newPass[i] = szTable[rand()%len];
			}
			newPass[i] = 0;
			SetWindowText(hEdit, newPass);
		}
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	case WM_PAINT:
		BeginPaint(hWnd, &ps);
		EnumChildWindows(hWnd, EnumChildProc, MAKELPARAM(FALSE, 0));
		EndPaint(hWnd, &ps);
		break;
	default:
		return DefWindowProc(hWnd, Msg, wParam, lParam);
	}
	return 0;
}