Applies to VB4+

Trimming Null Characters From Strings

Code
Example

Code

Most API functions use the null character, Chr$(0), to mark the end of strings that they return. To use the strings in Visual Basic, you often need to remove the null character. The ZTrim function in General.bas searches a string for the null character and returns everything preceding it:

vbNullChar is an intrinsic constant equivalent to Chr$(0).

Example

This code fragment displays the path of the user's Documents folder:

Dim Path As String
Path = String$(260, 0)
SHGetSpecialFolderPath hWnd, Path, CSIDL_PERSONAL, 0
MsgBox ZTrim(Path)

Here are the required DLL declarations:

Declare Function SHGetSpecialFolderPath Lib "shell32" _
    Alias "SHGetSpecialFolderPathA" (ByVal hWndOwner As Long, _
    ByVal lpszPath As String, ByVal nFolder As Long, _
    ByVal fCreate As Long) As Long

' Special folder constants:
Public Const CSIDL_PERSONAL = 5

Note that this example requires the Microsoft Internet Explorer 4.0 Desktop Update.