by T-REX Software (14 Submissions)
Category: Miscellaneous
Compatability: Visual Basic 4.0 (32-bit)
Difficulty: Unknown Difficulty
Originally Published: Wed 24th March 1999
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Errors, Returning API human readable descriptions. Returns system description for all error numbers
API Declarations
(ByVal dwFlags As Long, lpSource As Any, ByVal dwMessageId As Long, ByVal dwLanguageId As Long, _
ByVal lpBuffer As String, ByVal nSize As Long, Arguments As Long) As Long
Public Const FORMAT_MESSAGE_ALLOCATE_BUFFER = &H100
Public Const FORMAT_MESSAGE_ARGUMENT_ARRAY = &H2000
Public Const FORMAT_MESSAGE_FROM_HMODULE = &H800
Public Const FORMAT_MESSAGE_FROM_STRING = &H400
Public Const FORMAT_MESSAGE_FROM_SYSTEM = &H1000
Public Const FORMAT_MESSAGE_IGNORE_INSERTS = &H200
Public Const FORMAT_MESSAGE_MAX_WIDTH_MASK = &HFF
Public Const LANG_USER_DEFAULT = &H400&
Function GetLastErrorStr(dwErrCode As Long) As String
Static sMsgBuf As String * 257, dwLen As Long
dwLen = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM _
Or FORMAT_MESSAGE_IGNORE_INSERTS Or FORMAT_MESSAGE_MAX_WIDTH_MASK, ByVal 0&, _
dwErrCode, LANG_USER_DEFAULT, ByVal sMsgBuf, 256&, 0&)
If dwLen Then GetLastErrorStr = Left$(sMsgBuf, dwLen)
End Function
VBcoders
'Sub needs a textbox and label
Dim x
x = GetLastErrorStr(Val(Text1.Text))
Label1.Caption = x
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