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| HANDLE hFile = CreateFile("test.file",GENERIC_WRITE, | |
| 0,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL | |
| ); | |
| DWORD temp; | |
| DeviceIoControl(hFile, FSCTL_SET_SPARSE, NULL, 0, | |
| NULL, 0, &temp, NULL); | |
| LARGE_INTEGER li; | |
| li.QuadPart = 128LL * 1024 * 1024 - 1; | |
| SetFilePointerEx(hFile, li, NULL, FILE_BEGIN); | |
| SetEndOfFile(hFile); | |
| FILE_ZERO_DATA_INFORMATION zeroData; | |
| zeroData.FileOffset.QuadPart = 16LL * 1024 * 1024; | |
| zeroData.BeyondFinalZero.QuadPart = 32LL * 1024 * 1024; | |
| DeviceIoControl(hFile, FSCTL_SET_ZERO_DATA, &zeroData, | |
| sizeof(zeroData), NULL, 0, &temp, NULL); | |
| CloseHandle(hFile); |
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