了解即可，不细细研究了
# include<windows.h> LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); LRESULT CALLBACK ScrollProc(HWND, UINT, WPARAM, LPARAM); //拥有输入焦点的滚动条的ID int idFocus; /* 可以查看一下定义: ypedef LRESULT (CALLBACK* WNDPROC)(HWND, UINT, WPARAM, LPARAM); */ WNDPROC OldScroll[3];//WNDPROC是函数指针 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR lpCmdLine, int iCmdShow ) { static TCHAR szAppName[] = TEXT("那又怎样"); WNDCLASS wndclass; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hbrBackground = CreateSolidBrush(0); wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);//这里用NULL表示使用微软提供的图标 wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); //同上 wndclass.hInstance = hInstance; wndclass.lpfnWndProc = WndProc; wndclass.lpszClassName = szAppName; wndclass.lpszMenuName = NULL; wndclass.style = CS_HREDRAW | CS_VREDRAW; if (!RegisterClass(&wndclass))//注册窗口类 { MessageBox(NULL, "Program requires windows NT!", szAppName, MB_ICONERROR); return 0; } HWND hwnd; hwnd = CreateWindow(szAppName, TEXT("Color Scroll"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL,NULL, hInstance, NULL);//在窗口风格用或语句就可以加上滚动条了 ShowWindow(hwnd, SW_SHOW); UpdateWindow(hwnd); MSG msg; while (GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return 0; } LRESULT CALLBACK WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) { static COLORREF crPrim[3] = { RGB(255, 0, 0), RGB(0, 255, 0), RGB(0, 0, 255) };//三种颜色,红，绿，蓝 static HBRUSH hBrush[3], hBrushStatic; static HWND hwndScroll[3], hwndLabel[3], hwndValue[3], hwndRect; static int color[3], cyChar; static RECT rcColor; static TCHAR *szColorLabel[] = { TEXT("Red"), TEXT("Green"), TEXT("Blue") }; HINSTANCE hInstance; int i, cxClient, cyClient; TCHAR szBuffer[10]; switch (uMsg) { case WM_CREATE: //获取WinMain里的hInstance hInstance = (HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE); //Create the white-rectangle window against which the scroll bars will be positioned //The child window ID is 9 //左半部分背景 hwndRect = CreateWindow(TEXT("static"), NULL, WS_CHILD | WS_VISIBLE| SS_GRAYRECT, 0, 0, 0,0, hwnd, (HMENU)9, hInstance,NULL); for (i = 0; i < 3; i++) { //The three scroll bar have IDs 0,1 and 2,with scroll bar ranges from 0 through 255 hwndScroll[i] = CreateWindow(TEXT("scrollbar"), NULL, WS_CHILD | WS_VISIBLE | WS_TABSTOP | SBS_VERT, 0, 0, 0, 0, hwnd, (HMENU)i, hInstance, NULL); /* WS_TABSTOP Specifies a control that can receive the keyboard focus when the user presses the TAB key. Pressing the TAB key changes the keyboard focus to the next control with the WS_TABSTOP style. You can turn this style on and off to change dialog box navigation. To change this style after a window has been created, use SetWindowLong. */ SetScrollRange(hwndScroll[i], SB_CTL, 0, 255, FALSE); SetScrollPos(hwndScroll[i], SB_CTL, 0, FALSE); //The three color-name tables have IDs 3,4,and 5,and //text string "Red","Green",and "Blue". hwndLabel[i] = CreateWindow(TEXT("static"), szColorLabel[i], WS_CHILD | WS_VISIBLE | SS_CENTER, 0, 0, 0, 0, hwnd,(HMENU)(i + 3), hInstance, NULL); //The three color-value text fields have IDs 6,7,and 8, //and initial text strints of "0". hwndValue[i] = CreateWindow(TEXT("static"),TEXT("0"), WS_CHILD | WS_VISIBLE | SS_CENTER, 0, 0, 0, 0, hwnd, (HMENU)(i + 6), hInstance, NULL); //将三个滚动条的窗口过程设置为ScrollProc //试试三个滚动条的窗口过程都设置为同一窗口过程 OldScroll[i] = (WNDPROC)SetWindowLong(hwndScroll[i], GWL_WNDPROC, (LONG)ScrollProc); hBrush[i] = CreateSolidBrush(crPrim[i]); } //用来画静态控件的画刷 hBrushStatic = CreateSolidBrush(GetSysColor(COLOR_BTNHIGHLIGHT)); cyChar = HIWORD(GetDialogBaseUnits()); return 0; case WM_SIZE: cxClient = LOWORD(lParam); cyClient = HIWORD(lParam); //右半部分 SetRect(&rcColor, cxClient / 2, 0, cxClient, cyClient); //左半部分 MoveWindow(hwndRect, 0, 0, cxClient / 2, cyClient,TRUE); for (i = 0; i < 3; i++) { MoveWindow(hwndScroll[i], (2 * i + 1)*cxClient / 14,2*cyChar, cxClient / 14, cyClient - 4 * cyChar, TRUE); MoveWindow(hwndLabel[i], (4 * i + 1)*cxClient / 28, cyChar / 2, cxClient / 7, cyChar, TRUE); MoveWindow(hwndValue[i], (4 * i + 1)*cxClient / 28, cyClient - 3 * cyChar / 2, cxClient / 7, cyChar, TRUE); } SetFocus(hwnd); return 0; //主窗口具有输入焦点时，使得id为idFocus的滚动条具有输入焦点 case WM_SETFOCUS: SetFocus(hwndScroll[idFocus]); return 0; case WM_VSCROLL: //对于滚动条，lParam不会用到(为0)，而对于滚动条控制其值为滚动条控制的窗口句柄 i = GetWindowLong((HWND)lParam, GWL_ID); switch (LOWORD(wParam)) { case SB_PAGEDOWN: color[i] += 15; //fall through case SB_LINEDOWN: color[i] = min(255, color[i] + 1); break; case SB_PAGEUP: color[i] -= 15; case SB_LINEUP: color[i] = max(0, color[i] - 1); break; case SB_TOP: color[i] = 0; break; case SB_BOTTOM: color[i] = 255; break; case SB_THUMBPOSITION: case SB_THUMBTRACK: color[i] = HIWORD(wParam); break; default: break; } SetScrollPos(hwndScroll[i], SB_CTL, color[i], TRUE); wsprintf(szBuffer, TEXT("%d"), color[i]); SetWindowText(hwndValue[i], szBuffer); //删除未命名的背景画刷，即设计窗口类时用的: //wndclass.hbrBackground = CreateSolidBrush(0); //并用后面新创建的画刷代替 DeleteObject((HBRUSH)SetClassLong(hwnd, GCL_HBRBACKGROUND, (LONG)CreateSolidBrush(RGB(color[0], color[1], color[2])))); InvalidateRect(hwnd, &rcColor, TRUE); return 0; //查看msdn，一目了然 case WM_CTLCOLORSCROLLBAR: i = GetWindowLong((HWND)lParam, GWL_ID); return (LRESULT)hBrush[i]; case WM_CTLCOLORSTATIC: i = GetWindowLong((HWND)lParam, GWL_ID); if (i >= 3 && i <= 8) //static text controls { SetTextColor((HDC)wParam, crPrim[i % 3]); SetBkColor((HDC)wParam,GetSysColor(COLOR_BTNHIGHLIGHT)); return (LRESULT)hBrushStatic;//必须返回一个画刷用来画静态控件的背景 } break; /* 其实，i一定是在[3,8]范围，因为只有这6个控件是静态控件(创建窗口时包含SS_CENTER,为静态类型)，所以 父窗口只会收到这些控件的WM_CTLCOLORSTATIC消息，作者可能以为系统会收到别的控件的该消息，所以就break 跳出这一循环，如果是return 0则不行 */ case WM_SYSCOLORCHANGE: DeleteObject(hBrushStatic); hBrushStatic = CreateSolidBrush(GetSysColor(COLOR_BTNHIGHLIGHT)); return 0; case WM_CLOSE: auto iI = GCL_HBRBACKGROUND; //替换与类有关的背景刷子的句柄，这里就是删除注册窗口类时那个未命名的CreateSolidBrush(0)画刷句柄，并且 //之后背景画刷为WHITE_BRUSH DeleteObject((HBRUSH)SetClassLong(hwnd, GCL_HBRBACKGROUND, (LONG)GetStockObject(WHITE_BRUSH))); for (i = 0; i < 3; i++) DeleteObject(hBrush[i]); PostQuitMessage(0); //DestroyWindow(hwnd); return 0; } return DefWindowProc(hwnd, uMsg, wParam, lParam); } LRESULT CALLBACK ScrollProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { int id = GetWindowLong(hwnd, GWL_ID); switch (message) { //当前滚动条具有输入焦点，按下TAB键(同时按SHIFT键)，GetKeyState(VK_SHIFT)<0,然后设置相应的滚动条 //具有输入焦点 case WM_KEYDOWN: if (wParam == VK_TAB) SetFocus(GetDlgItem(GetParent(hwnd), (id + (GetKeyState(VK_SHIFT) < 0 ? 2 : 1)) % 3)); break;//不要return 0;外层还有主窗口的循环 case WM_SETFOCUS: idFocus = id;//具有输入焦点时更新idFocus的值 break; default: break; } /*可以使用带GWL_WNDPROC索引值的SetWindowLong函数创建一个窗口类的子类，该窗口类是用于创建该窗口的类。 一个应用程序可以以一个系统类为子类，但是不能以一个其他进程产生的窗口类为子类，SetwindowLong函数通过 改变与一个特殊的窗口类相联系的窗口过程来创建窗口子类，从而使系统调用新的窗口过程而不是以前定义的窗口过程。 应用程序必须通过调用CallWindowProc函数向前窗口传递未被新窗口处理的消息，这样作允许应用程序创建一个窗口 过程链。 */ return CallWindowProc(OldScroll[id], hwnd,message, wParam,lParam); }