Quick questions

[Dark Sean]

Does anyone know of a function to determine the screen resolution of the monitor through code?

AND/OR

Does anyone know how to determine the IP address of your own PC through code?

Thanks,

Sean

[psychopriest]

EnumDisplaySettings

this API-function can list all possible display-modes of a graphics-device. i'm not sure, whether it can tell you the current.

[Clearcode]

In VB4 and above you can use the Screen object i.e.


Debug.print Screen.Width / Screen.TwipsPerPixelX & " by " & Screen.Height / Screen.TwipsPerPixelY




HTH,
D

-------------------------------------------------
Ex. Datis: Duncan Jones
Merrion Computing Ltd
http://www.merrioncomputing.com
Check out the new downloads - ImageMap.ocx is the VB control that emulates an HTML image map, EventVB.OCX for adding new events to your VB form and adding System Tray support simply, MCL Hotkey for implemenmting system-wide hotkeys in your application...all with source code included.

[DSJ]

Here's some help for your second question:


private Const MAX_HOSTNAME_LEN = 132
private Const MAX_DOMAIN_NAME_LEN = 132
private Const MAX_SCOPE_ID_LEN = 260
private Const MAX_ADAPTER_NAME_LENGTH = 260
private Const MAX_ADAPTER_ADDRESS_LENGTH = 8
private Const MAX_ADAPTER_DESCRIPTION_LENGTH = 132
private Const ERROR_BUFFER_OVERFLOW = 111

private Type IP_ADDR_STRING
next as Long
IpAddress as string * 16
IpMask as string * 16
Context as Long
End Type

private Type IP_ADAPTER_INFO
next as Long
ComboIndex as Long
AdapterName as string * MAX_ADAPTER_NAME_LENGTH
Description as string * MAX_ADAPTER_DESCRIPTION_LENGTH
AddressLength as Long
Address(MAX_ADAPTER_ADDRESS_LENGTH - 1) as Byte
Index as Long
Type as Long
DhcpEnabled as Long
CurrentIpAddress as Long
IpAddressList as IP_ADDR_STRING
GatewayList as IP_ADDR_STRING
DhcpServer as IP_ADDR_STRING
HaveWins as Boolean
PrimaryWinsServer as IP_ADDR_STRING
SecondaryWinsServer as IP_ADDR_STRING
LeaseObtained as Long
LeaseExpires as Long
End Type

private Declare Function GetAdaptersInfo Lib "IPHlpApi" (IpAdapterInfo as Any, pOutBufLen as Long) as Long
private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination as Any, Source as Any, byval Length as Long)
Sub Form_Load()
Dim error as Long
Dim AdapterInfoSize as Long
Dim AdapterInfo as IP_ADAPTER_INFO
Dim AdapterInfoBuffer() as Byte

AdapterInfoSize = 0

error = GetAdaptersInfo(byval 0&, AdapterInfoSize)

If error <> 0 then
If error <> ERROR_BUFFER_OVERFLOW then
MsgBox "GetAdaptersInfo sizing failed with error " & error
Exit Sub
End If
End If

ReDim AdapterInfoBuffer(AdapterInfoSize - 1)

error = GetAdaptersInfo(AdapterInfoBuffer(0), AdapterInfoSize)
If error <> 0 then
MsgBox "GetAdaptersInfo failed with error " & error
Exit Sub
End If
CopyMemory AdapterInfo, AdapterInfoBuffer(0), len(AdapterInfo)
MsgBox "IP Address: " & AdapterInfo.IpAddressList.IpAddress
MsgBox "Subnet Mask: " & AdapterInfo.IpAddressList.IpMask
End Sub

[srinidhivarne]

For the second part of your question, you can use the WINSOCK control to find the ip address of the LOCAL HOST....

[John G Duffy]

Answer to QUestion 2

'In a form
option Explicit

private Sub Form_Load()
'KPD-Team 1999
'URL: http://www.allapi.net/
'E-Mail: KPDTeam@Allapi.net
MsgBox "IP-address: " + GetIPAddress
End Sub

'In a module
option Explicit

public Const MIN_SOCKETS_REQD as Long = 1
public Const WS_VERSION_REQD as Long = &H101
public Const WS_VERSION_MAJOR as Long = WS_VERSION_REQD \ &H100 And &HFF&
public Const WS_VERSION_MINOR as Long = WS_VERSION_REQD And &HFF&
public Const SOCKET_ERROR as Long = -1
public Const WSADESCRIPTION_LEN = 257
public Const WSASYS_STATUS_LEN = 129
public Const MAX_WSADescription = 256
public Const MAX_WSASYSStatus = 128
public Type WSAData
wVersion as Integer
wHighVersion as Integer
szDescription(0 to MAX_WSADescription) as Byte
szSystemStatus(0 to MAX_WSASYSStatus) as Byte
wMaxSockets as Integer
wMaxUDPDG as Integer
dwVendorInfo as Long
End Type
Type WSADataInfo
wVersion as Integer
wHighVersion as Integer
szDescription as string * WSADESCRIPTION_LEN
szSystemStatus as string * WSASYS_STATUS_LEN
iMaxSockets as Integer
iMaxUdpDg as Integer
lpVendorInfo as string
End Type
public Type HOSTENT
hName as Long
hAliases as Long
hAddrType as Integer
hLen as Integer
hAddrList as Long
End Type
Declare Function WSAStartupInfo Lib "WSOCK32" Alias "WSAStartup" (byval wVersionRequested as Integer, lpWSADATA as WSADataInfo) as Long
Declare Function WSACleanup Lib "WSOCK32" () as Long
Declare Function WSAGetLastError Lib "WSOCK32" () as Long
Declare Function WSAStartup Lib "WSOCK32" (byval wVersionRequired as Long, lpWSADATA as WSAData) as Long
Declare Function gethostname Lib "WSOCK32" (byval szHost as string, byval dwHostLen as Long) as Long
Declare Function gethostbyname Lib "WSOCK32" (byval szHost as string) as Long
Declare Sub CopyMemoryIP Lib "kernel32" Alias "RtlMoveMemory" (hpvDest as Any, byval hpvSource as Long, byval cbCopy as Long)
public Function GetIPAddress() as string
Dim sHostName as string * 256
Dim lpHost as Long
Dim HOST as HOSTENT
Dim dwIPAddr as Long
Dim tmpIPAddr() as Byte
Dim I as Integer
Dim sIPAddr as string
If Not SocketsInitialize() then
GetIPAddress = ""
Exit Function
End If
If gethostname(sHostName, 256) = SOCKET_ERROR then
GetIPAddress = ""
MsgBox "Windows Sockets error " & Str$(WSAGetLastError()) & " has occurred. Unable to successfully get Host Name."
SocketsCleanup
Exit Function
End If
sHostName = Trim$(sHostName)
lpHost = gethostbyname(sHostName)
If lpHost = 0 then
GetIPAddress = ""
MsgBox "Windows Sockets are not responding. " & "Unable to successfully get Host Name."
SocketsCleanup
Exit Function
End If
CopyMemoryIP HOST, lpHost, len(HOST)
CopyMemoryIP dwIPAddr, HOST.hAddrList, 4
ReDim tmpIPAddr(1 to HOST.hLen)
CopyMemoryIP tmpIPAddr(1), dwIPAddr, HOST.hLen
for I = 1 to HOST.hLen
sIPAddr = sIPAddr & tmpIPAddr(I) & "."
next
GetIPAddress = mid$(sIPAddr, 1, len(sIPAddr) - 1)
SocketsCleanup
End Function
public Function GetIPHostName() as string
Dim sHostName as string * 256
If Not SocketsInitialize() then
GetIPHostName = ""
Exit Function
End If
If gethostname(sHostName, 256) = SOCKET_ERROR then
GetIPHostName = ""
MsgBox "Windows Sockets error " & Str$(WSAGetLastError()) & " has occurred. Unable to successfully get Host Name."
SocketsCleanup
Exit Function
End If
GetIPHostName = Left$(sHostName, InStr(sHostName, Chr(0)) - 1)
SocketsCleanup
End Function
public Function HiByte(byval wParam as Integer)
HiByte = wParam \ &H100 And &HFF&
End Function
public Function LoByte(byval wParam as Integer)
LoByte = wParam And &HFF&
End Function
public Sub SocketsCleanup()
If WSACleanup() <> 0 then
MsgBox "Socket error occurred in Cleanup."
End If
End Sub
public Function SocketsInitialize() as Boolean
Dim WSAD as WSAData
Dim sLoByte as string
Dim sHiByte as string
If WSAStartup(WS_VERSION_REQD, WSAD) <> 0 then
MsgBox "The 32-bit Windows Socket is not responding."
SocketsInitialize = false
Exit Function
End If
If WSAD.wMaxSockets < MIN_SOCKETS_REQD then
MsgBox "This application requires a minimum of " & CStr(MIN_SOCKETS_REQD) & " supported sockets."
SocketsInitialize = false
Exit Function
End If
If LoByte(WSAD.wVersion) < WS_VERSION_MAJOR Or (LoByte(WSAD.wVersion) = WS_VERSION_MAJOR And HiByte(WSAD.wVersion) < WS_VERSION_MINOR) then
sHiByte = CStr(HiByte(WSAD.wVersion))
sLoByte = CStr(LoByte(WSAD.wVersion))
MsgBox "Sockets version " & sLoByte & "." & sHiByte & " is not supported by 32-bit Windows Sockets."
SocketsInitialize = false
Exit Function
End If
'must be OK, so lets do it
SocketsInitialize = true
End Function






John G