实战DeviceIoControl 之二：获取软盘/硬盘/光盘的参数

然后，在Toolbar的IDR_MAINFRAME上添加一个按钮，ID为ID_GET_DISK_GEOMETRY。打开ClassWizard，在DiskGeometryView中

添加ID_GET_DISK_GEOMETRY的映射函数OnGetDiskGeometry。打开DiskGeometryView.cpp，包含头文件GetDiskGeometry.h。

在OnGetDiskGeometry中，添加以下代码 const char *szDevName[]= { "\\\\.\\A:", "\\\\.\\B:", "\\\\.\\PhysicalDrive0", "\\\\.\\PhysicalDrive1", "\\\\.\\PhysicalDrive2", "\\\\.\\PhysicalDrive3", "\\\\.\\Cdrom0", "\\\\.\\Cdrom1", }; DISK_GEOMETRY dg; ULONGLONG DiskSize; BOOL bResult; CString strMsg; CString strTmp; for (int i = 0; i < sizeof(szDevName)/sizeof(char*); i++) { bResult = GetDriveGeometry(szDevName[i], &dg); strTmp.Format("\r\n%s result = %s\r\n", szDevName[i], bResult ? "success" : "failure"); strMsg+=strTmp; if (!bResult) continue; strTmp.Format(" Media Type = %d\r\n", dg.MediaType); strMsg+=strTmp; strTmp.Format(" Cylinders = %I64d\r\n", dg.Cylinders); strMsg+=strTmp; strTmp.Format(" Tracks per cylinder = %ld\r\n", (ULONG) dg.TracksPerCylinder); strMsg+=strTmp; strTmp.Format(" Sectors per track = %ld\r\n", (ULONG) dg.SectorsPerTrack); strMsg+=strTmp; strTmp.Format(" Bytes per sector = %ld\r\n", (ULONG) dg.BytesPerSector); strMsg+=strTmp; DiskSize = dg.Cylinders.QuadPart * (ULONG)dg.TracksPerCylinder * (ULONG)dg.SectorsPerTrack * (ULONG)dg.BytesPerSector; strTmp.Format(" Disk size = %I64d (Bytes) = %I64d (Mb)\r\n", DiskSize, DiskSize / (1024 * 1024)); strMsg+=strTmp; } CEdit& Edit = GetEditCtrl(); Edit.SetWindowText(strMsg);

最后，最后干什么呢？编译，运行......

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