11b 一个简单实用好学易于理解的模态对话框 附截图

/*------------------------------------------ABOUT2.C -- About Box Demo Program No. 2(c) Charles Petzold, 1998------------------------------------------*/#include <windows.h>#include "resource.h"LRESULT CALLBACK WndProc      (HWND, UINT, WPARAM, LPARAM) ;BOOL    CALLBACK AboutDlgProc (HWND, UINT, WPARAM, LPARAM) ;int iCurrentColor  = IDC_BLACK,//在窗口填充的背景颜色iCurrentFigure = IDC_RECT ;//在主窗口画图的形状int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow){static TCHAR szAppName[] = TEXT ("About2") ;MSG          msg ;HWND         hwnd ;WNDCLASS     wndclass ;wndclass.style         = CS_HREDRAW | CS_VREDRAW ;wndclass.lpfnWndProc   = WndProc ;wndclass.cbClsExtra    = 0 ;wndclass.cbWndExtra    = 0 ;wndclass.hInstance     = hInstance ;wndclass.hIcon         = LoadIcon (hInstance, szAppName) ;//采用自定的ICO图标wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;wndclass.lpszMenuName  = szAppName ;//引入自定义的资源menu文件wndclass.lpszClassName = szAppName ;if (!RegisterClass (&wndclass)){MessageBox (NULL, TEXT ("This program requires Windows NT!"),szAppName, MB_ICONERROR) ;return 0 ;}hwnd = CreateWindow (szAppName, TEXT ("About Box Demo Program"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, CW_USEDEFAULT,CW_USEDEFAULT, CW_USEDEFAULT,NULL, NULL, hInstance, NULL) ;ShowWindow (hwnd, iCmdShow) ;UpdateWindow (hwnd) ; while (GetMessage (&msg, NULL, 0, 0)){TranslateMessage (&msg) ;DispatchMessage (&msg) ;}return msg.wParam ;}void PaintWindow (HWND hwnd, int iColor, int iFigure)//绘制窗口形状颜色{static COLORREF crColor[8] = { RGB (  0,   0, 0), RGB (  0,   0, 255),RGB (  0, 255, 0), RGB (  0, 255, 255),RGB (255,   0, 0), RGB (255,   0, 255),RGB (255, 255, 0), RGB (255, 255, 255) } ;HBRUSH          hBrush ;HDC             hdc ;RECT            rect ;hdc = GetDC (hwnd) ;GetClientRect (hwnd, &rect) ;hBrush = CreateSolidBrush (crColor[iColor - IDC_BLACK]) ;hBrush = (HBRUSH) SelectObject (hdc, hBrush) ;if (iFigure == IDC_RECT)Rectangle (hdc, rect.left, rect.top, rect.right, rect.bottom) ;elseEllipse   (hdc, rect.left, rect.top, rect.right, rect.bottom) ;DeleteObject (SelectObject (hdc, hBrush)) ;ReleaseDC (hwnd, hdc) ;}void PaintTheBlock (HWND hCtrl, int iColor, int iFigure){InvalidateRect (hCtrl, NULL, TRUE) ;UpdateWindow (hCtrl) ;PaintWindow (hCtrl, iColor, iFigure) ;}LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){static HINSTANCE hInstance ;PAINTSTRUCT      ps ;switch (message){case WM_CREATE:hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;return 0 ;case WM_COMMAND:switch (LOWORD (wParam)){case IDM_APP_ABOUT:if (DialogBox (hInstance, TEXT ("AboutBox"), hwnd, AboutDlgProc))//在此处建立窗口dialogboxInvalidateRect (hwnd, NULL, TRUE) ;   //哦凑 找了半天原来更新主窗口颜色在这里// 如果点了ok返回yes 。invalidateRect向hwnd发送一个WM_PAINT消息、使窗口重绘了。return 0 ;}break ;case WM_PAINT:BeginPaint (hwnd, &ps) ;EndPaint (hwnd, &ps) ;PaintWindow (hwnd, iCurrentColor, iCurrentFigure) ;//return 0 ;case WM_DESTROY:PostQuitMessage (0) ;return 0 ;}return DefWindowProc (hwnd, message, wParam, lParam) ;}BOOL CALLBACK AboutDlgProc (HWND hDlg, UINT message,WPARAM wParam, LPARAM lParam){static HWND hCtrlBlock ;static int  iColor, iFigure ;switch (message){case WM_INITDIALOG:iColor  = iCurrentColor ;iFigure = iCurrentFigure ;CheckRadioButton (hDlg, IDC_BLACK, IDC_WHITE,   iColor) ;CheckRadioButton (hDlg, IDC_RECT,  IDC_ELLIPSE, iFigure) ;//BOOL CheckRadioButton（HWND hDlg， int nlDFirstButton， int nlDLastBUtton， int nlDCheckButton）；/*hDlg：指向包含单选按钮的对话框的句柄。nlDFirstButton：指定组中第1个单选按钮的标识符。nlDLastButton：指定组中最后一个单选按钮的标识符。nlDCheckButton：指出要选中的那个单选按钮的标识符。*/hCtrlBlock = GetDlgItem (hDlg, IDC_PAINT) ;//返回窗口中指定参数ID的子元素的句柄//IDC_PAINT 是 指向 DLG中 block区域 的句柄SetFocus (GetDlgItem (hDlg, iColor)) ;return FALSE ;case WM_COMMAND:switch (LOWORD (wParam)){case IDOK://当对话框返回OK时  更新主窗口颜色形状变量 结束DLGiCurrentColor  = iColor ;iCurrentFigure = iFigure ;EndDialog (hDlg, TRUE) ;return TRUE ;case IDCANCEL:EndDialog (hDlg, FALSE) ;return TRUE ;case IDC_BLACK:case IDC_RED:case IDC_GREEN:case IDC_YELLOW:case IDC_BLUE:case IDC_MAGENTA:case IDC_CYAN:case IDC_WHITE:iColor = LOWORD (wParam) ;CheckRadioButton (hDlg, IDC_BLACK, IDC_WHITE, LOWORD (wParam)) ;//wparam参数中存在着 颜色对应的IDPaintTheBlock (hCtrlBlock, iColor, iFigure) ;//绘制DLG中的BLOCK颜色return TRUE ;case IDC_RECT:case IDC_ELLIPSE:iFigure = LOWORD (wParam) ;CheckRadioButton (hDlg, IDC_RECT, IDC_ELLIPSE, LOWORD (wParam)) ;PaintTheBlock (hCtrlBlock, iColor, iFigure) ;return TRUE ;}break ;case WM_PAINT:PaintTheBlock (hCtrlBlock, iColor, iFigure) ;break ;}return FALSE ;}