VC雕虫小技集(三)

VC雕虫小技集(三)

分类： 2.3 VC技巧收集2010-01-14 17:54 78人阅读 评论(0) 收藏 举报

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
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");
}