很简单，只用到了一个非模态对话框，需要注意的是主窗口的样式包括WS_CLIPCHILDREN,这可以使程序在不擦除对话框的情况下重绘主窗口 color2.cpp
// Color2.cpp : 定义应用程序的入口点。 // #include "stdafx.h" #include "Color2.h" #define MAX_LOADSTRING 100 // 全局变量: HINSTANCE hInst; // 当前实例 TCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本 TCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名 HWND hDlgModeless; // 此代码模块中包含的函数的前向声明: ATOM MyRegisterClass(HINSTANCE hInstance); BOOL InitInstance(HINSTANCE, int); LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM); BOOL CALLBACK ColorScrDlg(HWND,UINT,WPARAM,LPARAM); int APIENTRY _tWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPTSTR lpCmdLine, _In_ int nCmdShow) { UNREFERENCED_PARAMETER(hPrevInstance); UNREFERENCED_PARAMETER(lpCmdLine); // TODO: 在此放置代码。 MSG msg; HACCEL hAccelTable; // 初始化全局字符串 LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING); LoadString(hInstance, IDC_COLOR2, szWindowClass, MAX_LOADSTRING); MyRegisterClass(hInstance); // 执行应用程序初始化: if (!InitInstance (hInstance, nCmdShow)) { return FALSE; } hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_COLOR2)); // 主消息循环: while (GetMessage(&msg, NULL, 0, 0)) { if (hDlgModeless == 0 || !IsDialogMessage(hDlgModeless,&msg)){ if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) { TranslateMessage(&msg); DispatchMessage(&msg); } } } return (int) msg.wParam; } // // 函数: MyRegisterClass() // // 目的: 注册窗口类。 // ATOM MyRegisterClass(HINSTANCE hInstance) { WNDCLASSEX wcex; wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW; wcex.lpfnWndProc = WndProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = hInstance; wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_COLOR2)); wcex.hCursor = LoadCursor(NULL, IDC_ARROW); wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wcex.lpszMenuName = MAKEINTRESOURCE(IDC_COLOR2); wcex.lpszClassName = szWindowClass; wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL)); return RegisterClassEx(&wcex); } // // 函数: InitInstance(HINSTANCE, int) // // 目的: 保存实例句柄并创建主窗口 // // 注释: // // 在此函数中，我们在全局变量中保存实例句柄并 // 创建和显示主程序窗口。 // BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) { HWND hWnd; hInst = hInstance; // 将实例句柄存储在全局变量中 hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW|WS_CLIPCHILDREN, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); if (!hWnd) { return FALSE; } ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); hDlgModeless = CreateDialog(hInst,TEXT("ColorScrDlg"),hWnd,ColorScrDlg); return TRUE; } // // 函数: WndProc(HWND, UINT, WPARAM, LPARAM) // // 目的: 处理主窗口的消息。 // // WM_COMMAND - 处理应用程序菜单 // WM_PAINT - 绘制主窗口 // WM_DESTROY - 发送退出消息并返回 // // LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { int wmId, wmEvent; PAINTSTRUCT ps; HDC hdc; switch (message) { case WM_COMMAND: wmId = LOWORD(wParam); wmEvent = HIWORD(wParam); // 分析菜单选择: switch (wmId) { case IDM_ABOUT: DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About); break; case IDM_EXIT: DestroyWindow(hWnd); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } break; case WM_PAINT: hdc = BeginPaint(hWnd, &ps); // TODO: 在此添加任意绘图代码... EndPaint(hWnd, &ps); break; case WM_DESTROY: DeleteObject((HGDIOBJ)SetClassLong(hWnd, GCL_HBRBACKGROUND, (LONG)GetStockObject(WHITE_BRUSH))); PostQuitMessage(0); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } return 0; } BOOL CALLBACK ColorScrDlg(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam){ static int iColor[3]; HWND hWndParent, hCtrl; int iCtrlID, iIndex; switch (message){ case WM_INITDIALOG: for (iCtrlID = 10; iCtrlID < 13; iCtrlID++){ hCtrl = GetDlgItem(hDlg,iCtrlID); SetScrollRange(hCtrl,SB_CTL,0,255,FALSE); SetScrollPos(hCtrl,SB_CTL,0,FALSE); } return TRUE; case WM_VSCROLL: hCtrl = (HWND)lParam; iCtrlID = GetWindowLong(hCtrl, GWL_ID); iIndex = iCtrlID - 10; hWndParent = GetParent(hDlg); switch (LOWORD(wParam)){ case SB_PAGEDOWN: iColor[iIndex] += 15; case SB_LINEDOWN: iColor[iIndex] = min(255,iColor[iIndex]+1); break; case SB_PAGEUP: iColor[iIndex] -= 15; case SB_LINEUP: iColor[iIndex] = max(0,iColor[iIndex]-1); break; case SB_TOP: iColor[iIndex] = 0; break; case SB_BOTTOM: iColor[iIndex] = 255; break; case SB_THUMBPOSITION: case SB_THUMBTRACK: iColor[iIndex] = HIWORD(wParam); break; default: return FALSE; } SetScrollPos(hCtrl, SB_CTL, iColor[iIndex], TRUE); SetDlgItemInt(hDlg, iCtrlID + 3, iColor[iIndex],FALSE); DeleteObject((HGDIOBJ)SetClassLong(hWndParent,GCL_HBRBACKGROUND,(LONG)CreateSolidBrush(RGB(iColor[0],iColor[1],iColor[2])))); InvalidateRect(hWndParent,NULL,TRUE); return TRUE; } return FALSE; } // “关于”框的消息处理程序。 INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) { UNREFERENCED_PARAMETER(lParam); switch (message) { case WM_INITDIALOG: return (INT_PTR)TRUE; case WM_COMMAND: if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) { EndDialog(hDlg, LOWORD(wParam)); return (INT_PTR)TRUE; } break; } return (INT_PTR)FALSE; }color2.rc资源文件
COLORSCRDLG DIALOG DISCARDABLE 16,16,120,141 STYLE DS_MODALFRAME|WS_POPUP|WS_VISIBLE|WS_CAPTION CAPTION "Color Scroll Scrollbars" FONT 8, "MS Sans Serif" BEGIN CTEXT "&Red",IDC_STATIC,8,8,24,8,NOT WS_GROUP SCROLLBAR 10,8,20,24,100,SBS_VERT|WS_TABSTOP CTEXT "0",13,8,124,24,8,NOT WS_GROUP CTEXT "&Green",IDC_STATIC,48,8,24,8,NOT WS_GROUP SCROLLBAR 11,48,20,24,100,SBS_VERT|WS_TABSTOP CTEXT "0",14,48,124,24,8,NOT WS_GROUP CTEXT "&Blue",IDC_STATIC,89,8,24,8,NOT WS_GROUP SCROLLBAR 12,89,20,24,100,SBS_VERT|WS_TABSTOP CTEXT "0",15,89,124,24,8,NOT WS_GROUP ENDresource.h
#define IDC_STATIC -1效果
