VC雕虫小技集(四)

 

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; 

}