VC最常用操作程序20项列举

    一、打开CD-ROM

　　mciSendString("Set cdAudio door open wait",NULL,0,NULL);

　　二、关闭CD_ROM

　　mciSendString("Set cdAudio door closed wait",NULL,0,NULL);

　　三、关闭计算机

OSVERSIONINFO OsVersionInfo; //包含操作系统版本信息的数据结构
OsVersionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&OsVersionInfo); //获取操作系统版本信息
if(OsVersionInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
{
//Windows98,调用ExitWindowsEx()函数重新启动计算机

DWORD dwReserved;
ExitWindowsEx(EWX_REBOOT,dwReserved); //可以改变第一个参数，实现注销用户、
//关机、关闭电源等操作
// 退出前的一些处理程序
}

　　四、重启计算机

typedef int (CALLBACK *SHUTDOWNDLG)(int); //显示关机对话框函数的指针
HINSTANCE hInst = LoadLibrary("shell32.dll"); //装入shell32.dll
SHUTDOWNDLG ShutDownDialog; //指向shell32.dll库中显示关机对话框函数的指针
if(hInst != NULL)
{
//获得函数的地址并调用之
ShutDownDialog = (SHUTDOWNDLG)GetProcAddress(hInst,(LPSTR)60);

(*ShutDownDialog)(0);
}

　　五、枚举所有字体

LOGFONT lf;
lf.lfCharSet = DEFAULT_CHARSET; // Initialize the LOGFONT structure
strcpy(lf.lfFaceName,"");
CClientDC dc (this);
// Enumerate the font families
::EnumFontFamiliesEx((HDC) dc,&lf,
(FONTENUMPROC) EnumFontFamProc,(LPARAM) this,0);
//枚举函数
int CALLBACK EnumFontFamProc(LPENUMLOGFONT lpelf,
LPNEWTEXTMETRIC lpntm,DWORD nFontType,long lparam)

{
// Create a pointer to the dialog window
CDay7Dlg* pWnd = (CDay7Dlg*) lparam;
// add the font name to the list box
pWnd ->m_ctlFontList.AddString(lpelf ->elfLogFont.lfFaceName);
// Return 1 to continue font enumeration
return 1;
}
其中m_ctlFontList是一个列表控件变量