loadingBar.Cpp

#include <windows.h>
#include <commctrl.h>
#include <string>
#include "resource.h"

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
HANDLE hwndButton;
HWND hWndProgressBar;

void CenterWindow(HWND);
LPWSTR stringToLPWSTR(const std::string& instr);

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow)
{
    MSG msg;
    WNDCLASSW wc = { 0 };
    wc.lpszClassName = L"Akakyuri";
    wc.hInstance = hInstance;
    wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
    wc.lpfnWndProc = WndProc;
    wc.hCursor = LoadCursor(0, IDC_ARROW);
    RegisterClassW(&wc);
    CreateWindowW(wc.lpszClassName, L"Akakyuri", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 260, 134, 288, 200, 0, 0, hInstance, 0);
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
    case WM_KEYDOWN:
        if (wParam == VK_ESCAPE)
        {
            int ret = MessageBoxW(hwnd, L"Woot?",
                L"Message", MB_OKCANCEL);
            if (ret == IDOK)
            {
                SendMessage(hwnd, WM_CLOSE, 0, 0);
            }
        }
        break;
    case WM_CREATE:
        CenterWindow(hwnd);
        hwndButton = CreateWindowW(L"Button", L"Click", WS_VISIBLE | WS_CHILD, 50, 9, 61, 21, hwnd, (HMENU)ID_BUTTON, NULL, NULL);
        //hWndProgressBar = CreateWindowW(NULL, PROGRESS_CLASS, WS_VISIBLE | WS_CHILD, 50, 9, 61, 21, hwnd, (HMENU)ID_BUTTON, NULL, NULL);
        hWndProgressBar = CreateWindowEx(0, PROGRESS_CLASS, (LPSTR)NULL, WS_VISIBLE | WS_CHILD, 10, 50, 200, 20, hwnd, (HMENU)IDPB_PROGRESS_BAR, (HINSTANCE)SetWindowLongPtr(hwnd, GWLP_HINSTANCE, DWLP_DLGPROC), NULL);
        //hWndProgressBar = CreateWindowW(PROGRESS_CLASS, (LPSTR)NULL, WS_VISIBLE | WS_CHILD, 10, 50, 200, 20, hwnd, (HMENU)IDPB_PROGRESS_BAR, (HINSTANCE)SetWindowLongPtr(hwnd, GWLP_HINSTANCE), NULL);
        if (!hWndProgressBar)
        {
            MessageBox(NULL, "Progress Bar Failed.", "Error", MB_OK | MB_ICONERROR);
            SendMessage(hwnd, PBM_SETRANGE, 0, MAKELPARAM(0, 9));
            SendMessage(hwnd, PBM_SETSTEP, (WPARAM)1, 0);
        }
        break;
    case WM_TIMER:
    {
        switch ((UINT)wParam)
        {
        case IDT_TIMER:
        {
            KillTimer(hwnd, IDT_TIMER);
            KillTimer(hwnd, IDT_PROGRESS_TIMER);
            MessageBox(NULL, "Timer Activated", "Success", MB_OK | MB_ICONINFORMATION);
        }
        break;
        case IDT_PROGRESS_TIMER:
            SendMessage(hWndProgressBar, PBM_STEPIT, 0, 0);
            break;
        }
    }
    break;
    case WM_COMMAND:
        if (LOWORD(wParam) == ID_BUTTON)
        {
            if (SetTimer(hwnd, IDT_TIMER, 5000, (TIMERPROC)NULL))
            {
                SetTimer(hwnd, IDT_PROGRESS_TIMER, 500, (TIMERPROC)NULL);
                MessageBox(NULL, "Timer set for 5 seconds", "Success", MB_OK | MB_ICONINFORMATION);
            }
            else
            {
                MessageBox(NULL, "Timer failed", "Error", MB_OK | MB_ICONERROR);
            }
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    }
    return DefWindowProcW(hwnd, msg, wParam, lParam);
}

void CenterWindow(HWND hwnd)
{
    RECT rc = { 0 };
    GetWindowRect(hwnd, &rc);
    int win_w = rc.right - rc.left;
    int win_h = rc.bottom - rc.top;
    int screen_w = GetSystemMetrics(SM_CXSCREEN);
    int screen_h = GetSystemMetrics(SM_CYSCREEN);
    SetWindowPos(hwnd, HWND_TOP, (screen_w - win_w) / 2, (screen_h - win_h) / 2, 0, 0, SWP_NOSIZE);
}

LPWSTR stringToLPWSTR(const std::string& instr)
{
    int bufferlen = ::MultiByteToWideChar(CP_ACP, 0, instr.c_str(), instr.size(), NULL, 0);
    LPWSTR widestr = new WCHAR[bufferlen + 1];
    ::MultiByteToWideChar(CP_ACP, 0, instr.c_str(), instr.size(), widestr, bufferlen);
    widestr[bufferlen] = 0;
    return widestr;
}