by VB Pro (6 Submissions)
Category: Windows System Services
Compatability: Visual Basic 4.0 (32-bit)
Difficulty: Unknown Difficulty
Originally Published: Thu 5th August 1999
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Get usefull Windows information with GetSystemInfo API call
API Declarations
dwOemID As Long
dwPageSize As Long
lpMinimumApplicationAddress As Long
lpMaximumApplicationAddress As Long
dwActiveProcessorMask As Long
dwNumberOrfProcessors As Long
dwProcessorType As Long
dwAllocationGranularity As Long
dwReserved As Long
End Type
Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128
End Type
Type MEMORYSTATUS
dwLength As Long
dwMemoryLoad As Long
dwTotalPhys As Long
dwAvailPhys As Long
dwTotalPageFile As Long
dwAvailPageFile As Long
dwTotalVirtual As Long
dwAvailVirtual As Long
End Type
'The following three Declare lines must be each entered on a single
'line.
Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA" _
(LpVersionInformation As OSVERSIONINFO) As Long
Declare Sub GlobalMemoryStatus Lib "kernel32" (lpBuffer As _
MEMORYSTATUS)
Declare Sub GetSystemInfo Lib "kernel32" (lpSystemInfo As _
SYSTEM_INFO)
Public Const PROCESSOR_INTEL_386 = 386
Public Const PROCESSOR_INTEL_486 = 486
Public Const PROCESSOR_INTEL_PENTIUM = 586
Public Const PROCESSOR_MIPS_R4000 = 4000
Public Const PROCESSOR_ALPHA_21064 = 21064
VBcoders
Dim msg As String ' Status information.
Dim NewLine As String ' New-line.
Dim ret As Integer ' OS Information
Dim ver_major As Integer ' OS Version
Dim ver_minor As Integer ' Minor Os Version
Dim Build As Long ' OS Build
NewLine = Chr(13) + Chr(10) ' New-line.
' Get operating system and version.
Dim verinfo As OSVERSIONINFO
verinfo.dwOSVersionInfoSize = Len(verinfo)
ret = GetVersionEx(verinfo)
If ret = 0 Then
MsgBox "Error Getting Version Information"
End
End If
Select Case verinfo.dwPlatformId
Case 0
msg = msg + "Windows 32s "
Case 1
msg = msg + "Windows 95 "
Case 2
msg = msg + "Windows NT "
End Select
ver_major = verinfo.dwMajorVersion
ver_minor = verinfo.dwMinorVersion
Build = verinfo.dwBuildNumber
msg = msg & ver_major & "." & ver_minor
msg = msg & " (Build " & Build & ")" & NewLine & NewLine
' Get CPU type and operating mode.
Dim sysinfo As SYSTEM_INFO
GetSystemInfo sysinfo
msg = msg + "CPU: "
Select Case sysinfo.dwProcessorType
Case PROCESSOR_INTEL_386
msg = msg + "Intel 386" + NewLine
Case PROCESSOR_INTEL_486
msg = msg + "Intel 486" + NewLine
Case PROCESSOR_INTEL_PENTIUM
msg = msg + "Intel Pentium" + NewLine
Case PROCESSOR_MIPS_R4000
msg = msg + "MIPS R4000" + NewLine
Case PROCESSOR_ALPHA_21064
msg = msg + "DEC Alpha 21064" + NewLine
Case Else
msg = msg + "(unknown)" + NewLine
End Select
msg = msg + NewLine
' Get free memory.
Dim memsts As MEMORYSTATUS
Dim memory As Long
GlobalMemoryStatus memsts
memory = memsts.dwTotalPhys
msg = msg + "Total Physical Memory: "
msg = msg + Format(memory \ 1024, "###,###,###") + "K" + NewLine
memory = memsts.dwAvailPhys
msg = msg + "Available Physical Memory: "
msg = msg + Format(memory \ 1024, "###,###,###") + "K" + NewLine
memory = memsts.dwTotalVirtual
msg = msg + "Total Virtual Memory: "
msg = msg + Format(memory \ 1024, "###,###,###") + "K" + NewLine
memory = memsts.dwAvailVirtual
msg = msg + "Available Virtual Memory: "
msg = msg + Format(memory \ 1024, "###,###,###") + "K" + NewLine
MsgBox msg, vbOKOnly, "System Info"
End Sub
