技巧
1. 如何激活当前屏幕保护程序
//激活当前屏幕保护程序, jingzhou xu
PostMessage(WM_SYSCOMMAND,SC_SCREENSAVE,0);
2. 如何禁止/启用屏幕保护及电源管理
static UINT dss_GetList[] = {SPI_GETLOWPOWERTIMEOUT, SPI_GETPOWEROFFTIMEOUT, SPI_GETSCREENSAVETIMEOUT};
static UINT dss_SetList[] = {SPI_SETLOWPOWERTIMEOUT, SPI_SETPOWEROFFTIMEOUT, SPI_SETSCREENSAVETIMEOUT};
static const int dss_ListCount = _countof(dss_GetList);
l 禁止屏幕保护及电源管理
{
m_pValue = new int[dss_ListCount];
for (int x=0;x<dss_ListCount;x++)
{
//禁止屏幕保护及电源管理
VERIFY(SystemParametersInfo (dss_SetList[x], 0, NULL, 0));
}
delete[] m_pValue;
}
l 启用屏幕保护及电源管理
{
m_pValue = new int[dss_ListCount];
for (int x=0;x<dss_ListCount;x++)
{
//启用屏幕保护及电源管理
VERIFY(SystemParametersInfo (dss_SetList[x], m_pValue[x], NULL, 0));
}
delete[] m_pValue;
}
3. 如何激活和关闭IE浏览器
//激活并打开IE
void lounchIE()
{
HWND h=FindWindowEx(NULL,NULL,NULL,
"Microsoft Internet Explorer") ;
ShellExecute(h,"open","C:\\simple.html",
NULL,NULL,SW_SHOWNORMAL);
}
//关闭IE及其它应用
void CloseIE()
{
int app=BSM_APPLICATIONS;
unsigned long bsm_app=(unsigned long )app;
BroadcastSystemMessage(BSF_POSTMESSAGE,&bsm_app,
WM_CLOSE,NULL,NULL);
}
4. 如何给树控件加入工具提示
l 首先给树控件加入TVS_INFOTIP属性风格,如下所示:
if (!m_ctrlTree.Create(WS_CHILD|WS_VISIBLE|
TVS_HASLINES|TVS_HASBUTTONS|TVS_LINESATROOT|TVS_SHOWSELALWAYS|TVS_INFOTIP, //加入提示TVS_INFOTIP,jingzhou xu(树控件ID:100)
CRect(0, 0, 0, 0), &m_wndTreeBar, 100))
{
TRACE0("Failed to create instant bar child\n");
return -1;
}
l 其次加入映射消息声明,如下所示:
afx_msg void OnGetInfoTip(NMHDR* pNMHDR,LRESULT* pResult); //树控件上加入提示消息,jingzhou xu
ON_NOTIFY(TVN_GETINFOTIP, 100, OnGetInfoTip) //树控件条目上加入提示,jingzhou xu
l 最后加入呼应涵数处理:
void CCreateTreeDlg::OnGetInfoTip(NMHDR* pNMHDR,
LRESULT* pResult)
{
*pResult = 0;
NMTVGETINFOTIP* pTVTipInfo = (NMTVGETINFOTIP*)pNMHDR;
LPARAM itemData = (DWORD) pTVTipInfo->lParam;
//对应每个条目的数据
HTREEITEM hItem = pTVTipInfo->hItem;
CString tip;
HTREEITEM hRootItem = m_chassisTree.GetRootItem();
if (hRootItem != pTVTipInfo->hItem)
{
tip = "树结点的提示";
}
else
{
tip = "树根上的提示";
}
strcpy(pTVTipInfo->pszText, (LPCTSTR) tip);
}
5. 如何获取系统信息框的路径
#include <atlbase.h>
#define IDS_REG_KEY_MSINFO_PATH1 _T( "Software\\Microsoft\\Shared Tools\\MSInfo" )
#define IDS_REG_KEY_MSINFO_PATH2 _T( "Software\\Microsoft\\Shared Tools Location" )
#define IDS_REG_VAL_MSINFO_PATH1 _T( "Path" )
#define IDS_REG_VAL_MSINFO_PATH2 _T( "MSInfo" )
#define IDS_MSINFO_EXE_NAME _T( "MSInfo32.exe" )
//...
BOOL GetSysInfoPath( CString& strPath )
{
strPath.Empty();
LPTSTR pszPath = strPath.GetBuffer( MAX_PATH );
CRegKey reg;
DWORD dwSize = MAX_PATH;
LONG nRet = reg.Open( HKEY_LOCAL_MACHINE, IDS_REG_KEY_MSINFO_PATH1, KEY_READ );
//在注册表中寻找第一个"MSInfo32.exe"位置
if ( nRet == ERROR_SUCCESS )
{
#if ( _MFC_VER >= 0x0700 )
nRet = reg.QueryStringValue( IDS_REG_VAL_MSINFO_PATH1, pszPath, &dwSize );
#else
nRet = reg.QueryValue( pszPath, IDS_REG_VAL_MSINFO_PATH1, &dwSize );
#endif
reg.Close();
}
//如果第一次寻找失败,则进行第二次寻找
if ( nRet != ERROR_SUCCESS )
{
nRet = reg.Open( HKEY_LOCAL_MACHINE, IDS_REG_KEY_MSINFO_PATH2, KEY_READ );
if ( nRet == ERROR_SUCCESS )
{
#if ( _MFC_VER >= 0x0700 )
reg.QueryStringValue( IDS_REG_VAL_MSINFO_PATH2, pszPath, &dwSize );
#else
reg.QueryValue( pszPath, IDS_REG_VAL_MSINFO_PATH2, &dwSize );
#endif
//路径名不包括EXE文件名
if ( nRet == ERROR_SUCCESS )
VERIFY( ::PathAppend( pszPath, IDS_MSINFO_EXE_NAME ) );
reg.Close();
}
}
strPath.ReleaseBuffer();
strPath.FreeExtra();
//检查文件是否有效.
return ::PathFileExists( strPath );
}
6. 如何直接运行一个资源中的程序
bool Run()
{
CFile f;
char* pFileName = "Execution.exe";
if( !f.Open( pFileName, CFile::modeCreate | CFile::modeWrite, NULL ) )
{
AfxMessageBox("Can not create file!");
return 0;
}
CString path = f.GetFilePath();
HGLOBAL hRes;
HRSRC hResInfo;
//获取应用实例
HINSTANCE insApp = AfxGetInstanceHandle();
//寻找EXE资源名
hResInfo = FindResource(insApp,(LPCSTR)IDR_EXE4,"EXE");
hRes = LoadResource(insApp,hResInfo ); // Load it
DWORD dFileLength = SizeofResource( insApp, hResInfo ); //计算EXE文件大小
f.WriteHuge((LPSTR)hRes,dFileLength); //写入临时文件
f.Close();
HINSTANCE HINSsd = ShellExecute(NULL, "open",path, NULL, NULL, SW_SHOWNORMAL);> //运行它.
return 1;
}