对话框(二)图说例子(经典)

对话框(2)图说例子(经典)

一个相对简单的例子，对学习对话框很有帮助：以VS2008为工具

1新建Win32项目，编写代码

2新建资源，添加ICON

如图：

3资源，添加菜单：

如图：

4资源，添加对话框，拖拽控件

如图：

其中左上角的ICON就是刚刚建立的ICON：

即：

还有一些值得注意的地方：

单选按钮，一个GroupBox只允许选一个

要这样设置：

所在的GroupBox,Group设置为False

如果要达到按Tab键，能够实现焦点跳跃，则这样设置（tabstop设为true）

具体代码如下：

#include<windows.h>#include"resource.h"void PaintWindow(HWND hwnd,int iColor,int iFigure);//声明一个函数，这个函数主要是改变窗体背景颜色BOOL CALLBACK DialogProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam);//声明对话框过程函数LRESULT CALLBACK WindowProc(  HWND hwnd,      // handle to window  UINT uMsg,      // message identifier  WPARAM wParam,  // first message parameter  LPARAM lParam   // second message parameter);int iCurrentColor=ID_BLACK;//声明两个全局变量，其中一个保存当前画刷的颜色int iCurrentFigure=ID_RECTANGLE;//全局变量，保存当前的选中的图形int WINAPI WinMain(  HINSTANCE hInstance,      // handle to current instance  HINSTANCE hPrevInstance,  // handle to previous instance  LPSTR lpCmdLine,          // command line  int nCmdShow              // show state){static TCHAR szAppName[]=TEXT("leidemingzi");HWND hwnd;MSG msg;WNDCLASS wndclass;HMENU hMenu;wndclass.cbClsExtra=0;wndclass.cbWndExtra=0;wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);wndclass.hIcon=LoadIcon(NULL,IDI_ERROR);wndclass.hInstance=hInstance;wndclass.lpfnWndProc=WindowProc;wndclass.lpszClassName=szAppName;wndclass.lpszMenuName=NULL;wndclass.style=CS_HREDRAW|CS_VREDRAW;if(!RegisterClass(&wndclass))//注册窗口{MessageBox(NULL,TEXT("the program require the window nt"),TEXT("tips"),MB_ICONERROR);return 0;}hMenu=LoadMenu(hInstance,MAKEINTRESOURCE(MENUID));//加载菜单hwnd=CreateWindow(  szAppName,  // registered class name  TEXT("this is title"), // window name  WS_OVERLAPPEDWINDOW,        // window style  CW_USEDEFAULT,                // horizontal position of window  CW_USEDEFAULT,                // vertical position of window  CW_USEDEFAULT,           // window width  CW_USEDEFAULT,          // window height  NULL,      // handle to parent or owner window  hMenu,          // menu handle or child identifier  hInstance,  // handle to application instance  NULL       // window-creation data);ShowWindow(hwnd,nCmdShow);UpdateWindow(hwnd);while(GetMessage(&msg,NULL,0,0)){TranslateMessage(&msg);DispatchMessage(&msg);}return msg.wParam;}LRESULT CALLBACK WindowProc(  HWND hwnd,      // handle to window  UINT uMsg,      // message identifier  WPARAM wParam,  // first message parameter  LPARAM lParam   // second message parameter){static HINSTANCE hInst;PAINTSTRUCT ps;switch(uMsg){case WM_CREATE:hInst=((LPCREATESTRUCT)lParam)->hInstance;return 0;case WM_COMMAND:switch(LOWORD(wParam)){case ID_HELP_ABOUT:DialogBox(hInst,MAKEINTRESOURCE(DIALOGID),hwnd,DialogProc);//显示对话框break;}return 0;case WM_PAINT:BeginPaint(hwnd,&ps);PaintWindow(hwnd,iCurrentColor,iCurrentFigure);MessageBeep(0);EndPaint(hwnd,&ps);return 0;case WM_DESTROY:PostQuitMessage(0);return 0;}return DefWindowProc(hwnd,uMsg,wParam,lParam);}void PaintWindow(HWND hwnd,int iColor,int iFigure){static COLORREF color[8]={RGB(0,0,0),RGB(0,0,255),RGB(0,255,0),RGB(0,255,255)//定义颜色数组，8种颜色，刚好对应单选按钮的颜色,RGB(255,0,0),RGB(255,0,255),RGB(255,255,0),RGB(255,255,255)};HDC hdc;RECT rect;hdc=GetDC(hwnd);GetClientRect(hwnd,&rect);HBRUSH hbrush=CreateSolidBrush(color[iColor-ID_BLACK]);//根据传进来的参数，创建画刷SelectObject(hdc,hbrush);//把画刷选入环境设备中去if(iFigure==ID_RECTANGLE){Rectangle(hdc,rect.left,rect.top,rect.right,rect.bottom);//绘画矩形，自动填充颜色}else{Ellipse(hdc,rect.left,rect.top,rect.right,rect.bottom);//绘画椭圆，自动填充颜色}ReleaseDC(hwnd,hdc);}void Flush(HWND hwnd)//这个方法是使客户区失效，从而触发WM_PAINT时间，不能直接在DialogProc使用InvaidateRect                       //因为DialogProc中的hwnd指的是Dialog的句柄{InvalidateRect(hwnd,NULL,TRUE);}BOOL CALLBACK DialogProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam){//static HWND hCtrlBlock;static int iColor,iFigure;switch(uMsg){case WM_INITDIALOG:iColor=ID_WHITE;iFigure=ID_RECTANGLE;return TRUE;case WM_COMMAND:switch(LOWORD(wParam))//低位的wParam是ID{case IDOK:iCurrentColor=iColor;iCurrentFigure=iFigure;//InvalidateRect(hwnd,NULL,TRUE);这是错误的，该hwnd是Dialog的句柄Flush(GetParent(hwnd));EndDialog(hwnd,0);//MessageBeep(0);当时是用来测试用的，这个方法不错。return TRUE;case IDCANCEL:EndDialog(hwnd,0);return TRUE;case ID_BLACK:case ID_BLUE:case ID_GREEN:case ID_CYAN:case ID_RED:case ID_MAGENTA:case ID_YELLOW:case ID_WHITE:iColor=LOWORD(wParam);CheckRadioButton(hwnd,ID_BLACK,ID_WHITE,LOWORD(wParam));//切换按钮状态//MessageBeep(0);return TRUE;case ID_RECTANGLE:case ID_ELLIPSE:iFigure=LOWORD(wParam);CheckRadioButton(hwnd,ID_RECTANGLE,ID_ELLIPSE,LOWORD(wParam));//切换按钮状态//MessageBeep(0);return TRUE;}break;}return FALSE;}

看看运行结果如何：

代码中有解释了，其中有一些很有用的函数，自己琢磨琢磨