ErrorInAPI

Code posted by Stefan Pendl on http://libertybasic.conforums.com/index.cgi tips board
then then turned into a function'function

[[code vbnet]]
function ErrorMessageFromAPI$()
    calldll #kernel32, "GetLastError", _
    ErrorCode as ulong

    dwFlags = _FORMAT_MESSAGE_FROM_SYSTEM
    nSize = 1024
    lpBuffer$ = space$(nSize); chr$(0)
    dwMessageID = ErrorCode

    calldll #kernel32, "FormatMessageA", _
    dwFlags as ulong, _
    lpSource as ulong, _
    dwMessageID as ulong, _
    dwLanguageID as ulong, _
    lpBuffer$ as ptr, _
    nSize as ulong, _
    Arguments as ulong, _
    result as ulong

    ErrorMessageFromAPI$ = "Error "; ErrorCode; ": "; left$(lpBuffer$, result)
end function
[[code]]