VC雕虫小技集(三)

VC雕虫小技集(三)
何志丹
1,固定窗口大小,最大值为(600,400),最小值也为(600,400).
void CMainFrame::OnGetMinMaxInfo(MINMAXINFO FAR* lpMMI)
{
lpMMI->ptMaxTrackSize.x = 600;
lpMMI->ptMaxTrackSize.y = 400;
lpMMI->ptMinTrackSize.x = 600;
lpMMI->ptMinTrackSize.y = 400;
CFrameWnd::OnGetMinMaxInfo(lpMMI);
}

2,关闭对话框和窗口:
其实，一般窗口的销毁可以用DestoryWindow(),对话框的销毁可以用EndDialiog().
EndDialog(IDOK);
DoModal()的返回值为IDOK,但不会执行用户定义的OnOK.
只要发送WM_CLOSE消息，就会有响应的函数处理的。
SendMessage(WM_CLOSE);
PostMessage(WM_CLOSE);
void CTestDialog::OnButton1()
{
GetParent()->DestroyWindow();
}
窗口和对话框一起关
PostMessage(WM_QUIT);
SendMessage(WM_QUIT);//不行
无模式对话框用DestroyWindow();
用EndDialog
你再打开原对话框就有问题

3,全局变量的使用:
C***App中定义一个CString
使用时
void CDlgDlg::OnButton2()
{
((CDlgApp*)AfxGetApp())->str = "test";
}
不要忘记了包含文件

4,如何让dos程序开机自动运行并且不显示自动运行好解决 ，写注册表run值，vc+windows2000
把main改为winmain

5,清除自动密码历史记录
浏览器中:工具->Internet选项->内容->点"自动完成(U)"按钮->清除密码http://tzsvc.xiloo.com/skill/sys/clear.htm
SHDeleteKey(HKEY_CURRENT_USER,_T("Software//Microsoft//Internet Explorer//IntelliForms"));

6,执行一个可执行程序
方法一:
ShellExecute(this->GetSafeHwnd(),"Open","f://he.txt",NULL,NULL,SW_SHOWNORMAL );
方法二:
PROCESS_INFORMATION pi;
STARTUPINFO si;
si.cb = sizeof(STARTUPINFO);
si.lpReserved = NULL;
si.lpDesktop = NULL;
si.lpTitle = NULL;
si.dwFlags = 0;
si.cbReserved2 = 0;
si.lpReserved2 = NULL;
BOOL bres = CreateProcess(NULL,"test a.txt b.txt",NULL,NULL,false,NORMAL_PRIORITY_CLASS,NULL,NULL,&si,π);
if(bres==false)
{
    AfxMessageBox("CreateProcess failed");
}
else
{
    CloseHandle(pi.hThread);
    DWORD dwret=WaitForSingleObject(pi.hProcess, 1000*30);
    switch(dwret)
    {
    case WAIT_OBJECT_0:
    DWORD dwexitcode;
    bres = GetExitCodeProcess(pi.hProcess,&dwexitcode);
    TCHAR exitmsgbuf[1024];
    if(bres)
    {
    wsprintf(exitmsgbuf,"exit code:%d",dwexitcode);
    }
    else
    wsprintf(exitmsgbuf,"exit code failed to return");
    AfxMessageBox(exitmsgbuf);
    break;
    default:
    AfxMessageBox("exit for other reason");
}

VC雕虫小技集(四)
何志丹

1, 阅读程序常常要看此变量在那些地方值改变过
ctrl+f查找太麻烦
将此变量前加const
改变的地方报错

2, 看一个函数被那些函数调用.
方法:
1,调试状态下,view->debug window->call Stack
2,class view 的快捷菜单中选择called by

3, 在状态栏的最左边显示时间
static UINT indicators[] =
{
ID_SEPARATOR,//我们增加的
ID_SEPARATOR,
ID_INDICATOR_CAPS,
ID_INDICATOR_NUM,
ID_INDICATOR_SCRL,
};
int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
..... m_wndStatusBar.SetPaneInfo(1,ID_SEPARTOR,SBPS_NORMAL,60);
}
//菜单的响应函数
void CMainFrame::OnTest()
{
CTime t;
t = CTime::GetCurrentTime();
CString str = t.Format("%H - %M -%S");
m_wndStatusBar.SetPaneText(0,str);
}

4,模拟鼠标
::SetCursorPos((int)ptMouse->x,(int)ptMouse->y);
::mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);
::mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);
::mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);
::mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);

5,什么是WORD, DWORD
typedef unsigned short WORD
typedef unsigned long DWORD

6,移动控件
CWnd * pWnd = GetDlgItem(IDC_BUTTON1);
CRect r;
pWnd->GetWindowRect(&r);
r.left +=50;
r.right += 50;
pWnd->MoveWindow(r);

7, 如何让对话框中的CEdit响应ENTER键回车
GetDlgItem(IDC_EDIT1)->SetWindowText("111/r/n22");
右键属性
sytle -> Multiline选上
最好把want return 也选上

8,将c语言转化为汇编
VC++ provides this feature.
Project->Settings...
C/C++ tab
Category: Choose Listing Files
Listing file type:
select "Assembly with source code"

9,如何获得进程所消耗的CPU时间?
BOOL GetProcessTimes(HANDLE hProcess,LPFILETIME lpCreationTime,LPFILETIME lpExitTime,LPFILETIME lpKernelTime,LPFILETIME lpUserTime);

10,如何通过扩展名得到该扩展名所对应的图标？
SHGetFileInfo(path,attr,&sfi,sizeof(SHFILEINFO),SHGFI_USEFILEATTRIBUTES | SHGFI_ICON | SHGFI_TYPENAME);
如何在拉着对话框的边框改变大小时,让它成比例的变化.就像视频播放软件哪样处理wm_sizing消息
void CTest 1Dlg::OnSizing(UINT fwSide, LPRECT pRect)
{
    CDialog::OnSizing(fwSide, pRect);
    if((fwSide==WMSZ_BOTTOM) || (fwSide==WMSZ_TOP))
    pRect->right=pRect->left+(pRect->bottom-pRect->top)*2;
    else
    pRect->bottom=pRect->top+(pRect->right-pRect->left)*0.5;
}