[c++] Compress file

Kako ustvariti datoteko, kjer se bo vsebina stisnila ( Windows ). Poskusil sem to kodo in ne deluje.

		HANDLE hvdisk = CreateFile( np_File, GENERIC_READ | GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_COMPRESSED, 0 );
		if ( hvdisk == INVALID_HANDLE_VALUE )
		{
			DWORD attr = 0;

			USHORT cmpr = TypeComptress;
			attr = 0;
			if( !DeviceIoControl( hvdisk, FSCTL_SET_COMPRESSION, &cmpr, sizeof(cmpr), NULL, 0, &attr, 0) )
			{
				printf( "Can't change file attributes. Error: %d\n", GetLastError() );
				CloseHandle(hvdisk);
				return;
			}
			CloseHandle(hvdisk);
		}