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Код

#include <windows.h>
#include <commctrl.h>
#include "ProgressBar.h"

HINSTANCE hInst;
static HWND hProgressBarWnd;

LRESULT CALLBACK ProgressBarWndProc(HWND, UINT, UINT, LONG);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdParam, int nCmdShow)
{
    HWND hWnd;
    WNDCLASS WndClass;
    MSG Msg;

    char szClassName[] = "ProgressBarDemo";
    hInst = hInstance;

    WndClass.style = CS_HREDRAW | CS_VREDRAW;
    WndClass.lpfnWndProc = ProgressBarWndProc;
    WndClass.cbClsExtra = 0;
    WndClass.cbWndExtra = 0;
    WndClass.hInstance = hInstance;
    WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
    WndClass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
    WndClass.lpszMenuName = NULL;
    WndClass.lpszClassName = szClassName;

    if(!RegisterClass(&WndClass))
    {
        MessageBox(NULL, "Cannot register class", "Error", MB_OK);
        return 0;
    }

    hWnd = CreateWindow(szClassName, "Progressbar Demonstration Program", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);

    if(!hWnd)
    {
        MessageBox(NULL, "Cannot create windows", "Error", MB_OK);
        return 0;
    }

    ShowWindow(hWnd,nCmdShow);
    UpdateWindow(hWnd);

    while(GetMessage(&Msg,NULL,0,0))
    {
        TranslateMessage(&Msg);
        DispatchMessage (&Msg);
    }

    return Msg.wParam;
}

LRESULT CALLBACK ProgressBarWndProc(HWND hWnd, UINT Message, UINT wParam, LONG lParam)
{
    switch(Message)
    {
        case WM_CREATE:
            hProgressBarWnd = CreateWindow(PROGRESS_CLASS, NULL, WS_CHILD | WS_VISIBLE, 0, 0, 0, 0, hWnd, NULL, NULL, NULL);

            if(!hProgressBarWnd)
            {
                MessageBox(NULL, "Cannot create progress", "Error", MB_OK);
                return 0;
            }

            SendMessage(hProgressBarWnd, PBM_SETRANGE, 0, MAKELPARAM(0,10));
            SendMessage(hProgressBarWnd, PBM_SETSTEP, 1, 0);
            SendMessage(hProgressBarWnd, PBM_SETPOS, 8, 0);
            break;




        case WM_DESTROY:
          PostQuitMessage(0);
          return 0;
    }
    return DefWindowProc(hWnd,Message,wParam,lParam);
}