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Tip of the Day
Language: VB5,VB6
Expertise: beginner
Oct 13, 2001

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Determine memory usage

The GlobalMemoryStatus API function returns detailed information about the current load on the physical and virtual memory. You can use the following code to display the current amount of free memory:

    Dim ms As MEMORYSTATUS
    Dim msg As String
    
    ' query for memory data
    ms.dwLength = Len(ms)
    GlobalMemoryStatus ms
    ' create a result message.
    msg = "Total physical memory = " & GetKbytes(ms.dwTotalPhys) & vbCrLf & _
        "Available physical memory = " & GetKbytes(ms.dwAvailPhys) & vbCrLf & _
        "Memory Load = " & ms.dwMemoryLoad & "%" & vbCrLf & _
        "Total Page file = " & GetKbytes(ms.dwTotalPageFile) & vbCrLf & _
        "Available Page file = " & GetKbytes(ms.dwAvailPageFile) & vbCrLf & _
        "Total Virtual memory = " & GetKbytes(ms.dwTotalVirtual) & vbCrLf & _
        "Available Virtual memory = " & GetKbytes(ms.dwAvailVirtual)
    MsgBox msg, vbInformation, "Memory information"
The GetKbytes function is a simple routine that converts a number of bytes into Kbytes, and adds thousand separators:

' Format a memory amoung as a Kbyte or Megabyte

Function GetKbytes(ByVal amount As Long) As String
    ' convert to Kbytes
    amount = amount \ 1024
    GetKbytes = Format(amount, "###,###,###K")
End Function
Francesco Balena
 
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