用Win32 实现进度条

转载:http://www.cctry.com/thread-238862-1-1.html

     #include <windows.h>
     #include <commctrl.h>        //InitCommonControls
     #pragma comment(lib, "comctl32") //InitCommonControls
     //过程函数的返回值都是LRESULT,类型都是CALLBACK
     LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam);
     int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPTSTR lpszCmdLine,int nCmdShow)
     {
         HWND hwnd;        //主窗口句柄,在CreateWindow中赋值
         MSG msg;        //消息变量,在GetMessage中使用
         WNDCLASS wndclass;        //窗口类
         TCHAR* szAppName = TEXT("ProgressBar");    //类名和窗口名
         wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);    //窗口背景
         wndclass.hCursor = LoadCursor(NULL,IDC_ARROW);        //鼠标
         wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION);    //图标
         wndclass.lpszClassName = szAppName;        //类名
         wndclass.cbClsExtra = ;        //类的额外参数
         wndclass.cbWndExtra = ;        //窗口的额外参数.用于基于同一窗口类的窗口各自区分.
                                         //在自定义对话框类时必须指定为DLGWINDOWEXTRA的大小
         wndclass.lpszMenuName = NULL;    //菜单名.可以用作子窗口的id
         wndclass.style = CS_HREDRAW | CS_VREDRAW;    //窗口风格
         wndclass.lpfnWndProc = WndProc;        //窗口过程
         wndclass.hInstance = hInstance;        //包含窗口过程的实例句柄

         if( !RegisterClass(&wndclass) )        //注册窗口类
             return ;
         hwnd = CreateWindow(                //创建窗口
                     szAppName,                //窗口类名
                     szAppName,                //窗口标题
                     WS_OVERLAPPEDWINDOW,    //窗口风格
                     CW_USEDEFAULT,            //初始的x坐标
                     CW_USEDEFAULT,            //初始的y坐标
                     CW_USEDEFAULT,            //初始的宽度
                     CW_USEDEFAULT,            //初始的高度
                     NULL,                    //父窗口
                     NULL,                    //菜单
                     hInstance,                //和窗口相关的实例句柄
                     NULL                    //额外参数
                     );
         ShowWindow( hwnd,nCmdShow );        //显示窗口
         UpdateWindow( hwnd );                //更新窗口
         while( GetMessage(&msg,NULL,,) )    //消息循环
         {
             TranslateMessage(&msg);            //将WM_XXXKEYXXX消息翻译为WM_CHAR消息
             DispatchMessage(&msg);            //传递消息到窗口过程
         }
         return msg.wParam;                    //返回
     }

     DWORD WINAPI PBThreadProc( LPVOID lpParameter )
     {
         HWND hwndPB = (HWND) lpParameter;    //进度条的窗口句柄
         PBRANGE range;                        //进度条的范围

         SendMessage( hwndPB, PBM_SETRANGE,    //设置进度条的范围
             (WPARAM), (LPARAM)(MAKELPARAM(,)) );

         SendMessage( hwndPB, PBM_GETRANGE,    //获取进度条的范围
             (WPARAM)TRUE,                    //TRUE 表示返回值为范围的最小值,FALSE表示返回最大值
             (LPARAM)&range );

         while(TRUE)
         {
             SendMessage( hwndPB, PBM_DELTAPOS, //设置进度条的新位置为当前位置加上范围的1/20
                 (WPARAM)((range.iHigh-range.iLow)/), (LPARAM) );
             if( SendMessage( hwndPB, PBM_GETPOS, (WPARAM), (LPARAM) ) //取得进度条当前位置
                  == range.iHigh )
             {
                 SendMessage( hwndPB, PBM_SETPOS, (WPARAM)range.iLow, (LPARAM) ); //将进度条复位
             }
             Sleep();
         }
     }

     LRESULT WINAPI WndProc( HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam )
     {
         static HWND hwndPB;
         switch( message )
         {
         case WM_CREATE:
             {
                 InitCommonControls(); //确保已注册了进度条类PROGRESS_CLASS
                 hwndPB = CreateWindowEx(
                     ,
                     PROGRESS_CLASS,
                     NULL,
                     WS_CHILD | WS_VISIBLE,
                     ,,,,            //位置和大小在WM_SIZE中设置
                     hwnd,
                     (HMENU),
                     ((LPCREATESTRUCT)lParam)->hInstance,
                     NULL);
                 CreateThread(            //操作进度条的线程
                     NULL,
                     ,
                     (LPTHREAD_START_ROUTINE)PBThreadProc,
                     hwndPB,
                     ,

                     );
                 return ;
             }
         case WM_SIZE:
             {
                 RECT rc;
                 GetClientRect(hwnd, &rc);
                 MoveWindow(
                     hwndPB,
                     rc.left,
                     (rc.bottom - rc.top )/,
                     rc.right - rc.left,
                     (rc.bottom - rc.top )/,
                     TRUE
                     );
                 return ;
             }
         case WM_DESTROY:
             PostQuitMessage();
             return ;
         }
         return DefWindowProc( hwnd,message,wParam,lParam );
     }