functions not returning data!

ok i have some code in a dll and when i call it it nothing happens, i mean it should return the data but its not, i can put thesame code in the exe and it works fine.

VB Code:

Public Function GetSettingString(hKey As Long, strPath As String, strValue As String, Optional Default As String) As String
Dim hCurKey As Long
Dim lValueType As Long
Dim strbuffer As String
Dim lDataBufferSize As Long
Dim intZeroPos As Integer
Dim lRegResult As Long
' Set up default value
If Not IsEmpty(Default) Then
  GetSettingString = Default
Else
  GetSettingString = ""
End If
' Open the key and get length of string
lRegResult = RegOpenKey(hKey, strPath, hCurKey)
lRegResult = RegQueryValueEx(hCurKey, strValue, 0&, lValueType, ByVal 0&, lDataBufferSize)
If lRegResult = ERROR_SUCCESS Then
  If lValueType = REG_SZ Then
    ' initialise string buffer and retrieve string
    strbuffer = String(lDataBufferSize, " ")
    lRegResult = RegQueryValueEx(hCurKey, strValue, 0&, 0&, ByVal strbuffer, lDataBufferSize)
    ' format string
    intZeroPos = InStr(strbuffer, Chr$(0))
    If intZeroPos > 0 Then
      GetSettingString = Left$(strbuffer, intZeroPos - 1)
    Else
      GetSettingString = strbuffer
    End If
  End If
Else
  ' there is a problem
End If
lRegResult = RegCloseKey(hCurKey)
End Function

You should only use the IsEmpty function when using variants. Try modifying that.

Also, try stepping through it.

Add your DLL project to your Client EXE project, step though it and see what happens.