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;
}