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Memory Status

Memory Status

Visual Studio 6.0

The MemoryStatus class (MEMORYSTATUS.CLS) is simple, with just a few properties, all of them read-only. The properties, listed in Table 9.12, allow you to peek at the current memory situation in the computer that's running your application.

Table 9.12: Properties for the MemoryStatus Class

Property Description
MemoryLoad Number between 0–100 that gives a general idea of current memory utilization, in which 0 indicates no memory use and 100 indicates full memory use
TotalPhysical Indicates the total number of bytes of physical memory
AvailablePhysical Indicates the number of bytes of physical memory available
TotalPageFile Indicates the total number of bytes that can be stored in the paging file, not the size of the paging file on disk
AvailablePageFile Indicates the number of bytes available in the paging file
TotalVirtual Indicates the total number of bytes that can be described in the user mode portion of the virtual address space of the calling process
AvailableVirtual Indicates the number of bytes of unreserved and uncommitted memory in the user mode portion of the virtual address space of the calling process

There are no properties in the MemoryStatus class dealing with available resources, as there might have been in a class written for a 16-bit operating system. The Win32 API does not contain any tools to retrieve information about available resources since this isn't supposed to be an issue in 32-bit Windows. (Anyone who's used Windows 95 extensively knows this isn't the case, but under Windows NT, you certainly won't be worrying about resource usage.)

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